diff --git a/src/Gui/BlenderNavigationStyle.cpp b/src/Gui/BlenderNavigationStyle.cpp
index b5b0cfbc42..7e10aa9e77 100644
--- a/src/Gui/BlenderNavigationStyle.cpp
+++ b/src/Gui/BlenderNavigationStyle.cpp
@@ -107,15 +107,7 @@ SbBool BlenderNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     // Mismatches in state of the modifier keys happens if the user
     // presses or releases them outside the viewer window.
-    if (this->ctrldown != ev->wasCtrlDown()) {
-        this->ctrldown = ev->wasCtrlDown();
-    }
-    if (this->shiftdown != ev->wasShiftDown()) {
-        this->shiftdown = ev->wasShiftDown();
-    }
-    if (this->altdown != ev->wasAltDown()) {
-        this->altdown = ev->wasAltDown();
-    }
+    syncModifierKeys(ev);
 
     // give the nodes in the foreground root the chance to handle events (e.g color bar)
     if (!viewer->isEditing()) {
diff --git a/src/Gui/CADNavigationStyle.cpp b/src/Gui/CADNavigationStyle.cpp
index cd8067abb3..c973e56a3d 100644
--- a/src/Gui/CADNavigationStyle.cpp
+++ b/src/Gui/CADNavigationStyle.cpp
@@ -111,15 +111,7 @@ SbBool CADNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     // Mismatches in state of the modifier keys happens if the user
     // presses or releases them outside the viewer window.
-    if (this->ctrldown != ev->wasCtrlDown()) {
-        this->ctrldown = ev->wasCtrlDown();
-    }
-    if (this->shiftdown != ev->wasShiftDown()) {
-        this->shiftdown = ev->wasShiftDown();
-    }
-    if (this->altdown != ev->wasAltDown()) {
-        this->altdown = ev->wasAltDown();
-    }
+    syncModifierKeys(ev);
 
     // give the nodes in the foreground root the chance to handle events (e.g color bar)
     if (!viewer->isEditing()) {
diff --git a/src/Gui/GestureNavigationStyle.cpp b/src/Gui/GestureNavigationStyle.cpp
index 98a1e3e2a7..7d0732ae54 100644
--- a/src/Gui/GestureNavigationStyle.cpp
+++ b/src/Gui/GestureNavigationStyle.cpp
@@ -918,9 +918,8 @@ SbBool GestureNavigationStyle::processSoEvent(const SoEvent* const ev)
         //whatever else, we don't track
         }
     }
-    this->ctrldown = ev->wasCtrlDown();
-    this->shiftdown = ev->wasShiftDown();
-    this->altdown = ev->wasAltDown();
+
+    syncModifierKeys(ev);
 
     smev.modifiers =
         (this->button1down ? NS::Event::BUTTON1DOWN : 0) |
diff --git a/src/Gui/InventorNavigationStyle.cpp b/src/Gui/InventorNavigationStyle.cpp
index 74062c51b8..2aaad878ff 100644
--- a/src/Gui/InventorNavigationStyle.cpp
+++ b/src/Gui/InventorNavigationStyle.cpp
@@ -115,15 +115,7 @@ SbBool InventorNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     // Mismatches in state of the modifier keys happens if the user
     // presses or releases them outside the viewer window.
-    if (this->ctrldown != ev->wasCtrlDown()) {
-        this->ctrldown = ev->wasCtrlDown();
-    }
-    if (this->shiftdown != ev->wasShiftDown()) {
-        this->shiftdown = ev->wasShiftDown();
-    }
-    if (this->altdown != ev->wasAltDown()) {
-        this->altdown = ev->wasAltDown();
-    }
+    syncModifierKeys(ev);
 
     // give the nodes in the foreground root the chance to handle events (e.g color bar)
     if (!viewer->isEditing()) {
diff --git a/src/Gui/MayaGestureNavigationStyle.cpp b/src/Gui/MayaGestureNavigationStyle.cpp
index dbb5815a6c..2a34f062e5 100644
--- a/src/Gui/MayaGestureNavigationStyle.cpp
+++ b/src/Gui/MayaGestureNavigationStyle.cpp
@@ -190,9 +190,7 @@ SbBool MayaGestureNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     // Mismatches in state of the modifier keys happens if the user
     // presses or releases them outside the viewer window.
-    this->ctrldown = ev->wasCtrlDown();
-    this->shiftdown = ev->wasShiftDown();
-    this->altdown = ev->wasAltDown();
+    syncModifierKeys(ev);
     //before this block, mouse button states in NavigationStyle::buttonXdown reflected those before current event arrived.
     //track mouse button states
     if (evIsButton) {
diff --git a/src/Gui/NavigationStyle.cpp b/src/Gui/NavigationStyle.cpp
index 43a4a73045..c923f142ea 100644
--- a/src/Gui/NavigationStyle.cpp
+++ b/src/Gui/NavigationStyle.cpp
@@ -1372,6 +1372,21 @@ void NavigationStyle::clearLog(void)
     this->log.historysize = 0;
 }
 
+void NavigationStyle::syncModifierKeys(const SoEvent * const ev)
+{
+    // Mismatches in state of the modifier keys happens if the user
+    // presses or releases them outside the viewer window.
+    if (this->ctrldown != ev->wasCtrlDown()) {
+        this->ctrldown = ev->wasCtrlDown();
+    }
+    if (this->shiftdown != ev->wasShiftDown()) {
+        this->shiftdown = ev->wasShiftDown();
+    }
+    if (this->altdown != ev->wasAltDown()) {
+        this->altdown = ev->wasAltDown();
+    }
+}
+
 // The viewer is a state machine, and all changes to the current state
 // are made through this call.
 void NavigationStyle::setViewingMode(const ViewerMode newmode)
diff --git a/src/Gui/NavigationStyle.h b/src/Gui/NavigationStyle.h
index 659d8f9e03..959500a102 100644
--- a/src/Gui/NavigationStyle.h
+++ b/src/Gui/NavigationStyle.h
@@ -213,6 +213,7 @@ protected:
     void clearLog(void);
     void addToLog(const SbVec2s pos, const SbTime time);
 
+    void syncModifierKeys(const SoEvent * const ev);
 
 protected:
     struct { // tracking mouse movement in a log
diff --git a/src/Gui/OpenCascadeNavigationStyle.cpp b/src/Gui/OpenCascadeNavigationStyle.cpp
index b554327b66..6f6fa816d4 100644
--- a/src/Gui/OpenCascadeNavigationStyle.cpp
+++ b/src/Gui/OpenCascadeNavigationStyle.cpp
@@ -107,15 +107,7 @@ SbBool OpenCascadeNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     // Mismatches in state of the modifier keys happens if the user
     // presses or releases them outside the viewer window.
-    if (this->ctrldown != ev->wasCtrlDown()) {
-        this->ctrldown = ev->wasCtrlDown();
-    }
-    if (this->shiftdown != ev->wasShiftDown()) {
-        this->shiftdown = ev->wasShiftDown();
-    }
-    if (this->altdown != ev->wasAltDown()) {
-        this->altdown = ev->wasAltDown();
-    }
+    syncModifierKeys(ev);
 
     // give the nodes in the foreground root the chance to handle events (e.g color bar)
     if (!viewer->isEditing()) {
diff --git a/src/Gui/OpenSCADNavigationStyle.cpp b/src/Gui/OpenSCADNavigationStyle.cpp
index 0148e46eb3..6106d4eb14 100644
--- a/src/Gui/OpenSCADNavigationStyle.cpp
+++ b/src/Gui/OpenSCADNavigationStyle.cpp
@@ -107,15 +107,7 @@ SbBool OpenSCADNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     // Mismatches in state of the modifier keys happens if the user
     // presses or releases them outside the viewer window.
-    if (this->ctrldown != ev->wasCtrlDown()) {
-        this->ctrldown = ev->wasCtrlDown();
-    }
-    if (this->shiftdown != ev->wasShiftDown()) {
-        this->shiftdown = ev->wasShiftDown();
-    }
-    if (this->altdown != ev->wasAltDown()) {
-        this->altdown = ev->wasAltDown();
-    }
+    syncModifierKeys(ev);
 
     // give the nodes in the foreground root the chance to handle events (e.g color bar)
     if (!viewer->isEditing()) {
diff --git a/src/Gui/RevitNavigationStyle.cpp b/src/Gui/RevitNavigationStyle.cpp
index 977d0c01a2..289af98f9b 100644
--- a/src/Gui/RevitNavigationStyle.cpp
+++ b/src/Gui/RevitNavigationStyle.cpp
@@ -107,15 +107,7 @@ SbBool RevitNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     // Mismatches in state of the modifier keys happens if the user
     // presses or releases them outside the viewer window.
-    if (this->ctrldown != ev->wasCtrlDown()) {
-        this->ctrldown = ev->wasCtrlDown();
-    }
-    if (this->shiftdown != ev->wasShiftDown()) {
-        this->shiftdown = ev->wasShiftDown();
-    }
-    if (this->altdown != ev->wasAltDown()) {
-        this->altdown = ev->wasAltDown();
-    }
+    syncModifierKeys(ev);
 
     // give the nodes in the foreground root the chance to handle events (e.g color bar)
     if (!viewer->isEditing()) {
diff --git a/src/Gui/TouchpadNavigationStyle.cpp b/src/Gui/TouchpadNavigationStyle.cpp
index 7b279eefc4..d039c54de9 100644
--- a/src/Gui/TouchpadNavigationStyle.cpp
+++ b/src/Gui/TouchpadNavigationStyle.cpp
@@ -107,15 +107,7 @@ SbBool TouchpadNavigationStyle::processSoEvent(const SoEvent * const ev)
 
     // Mismatches in state of the modifier keys happens if the user
     // presses or releases them outside the viewer window.
-    if (this->ctrldown != ev->wasCtrlDown()) {
-        this->ctrldown = ev->wasCtrlDown();
-    }
-    if (this->shiftdown != ev->wasShiftDown()) {
-        this->shiftdown = ev->wasShiftDown();
-    }
-    if (this->altdown != ev->wasAltDown()) {
-        this->altdown = ev->wasAltDown();
-    }
+    syncModifierKeys(ev);
 
     // give the nodes in the foreground root the chance to handle events (e.g color bar)
     if (!viewer->isEditing()) {