diff --git a/src/Base/UnitsApi.cpp b/src/Base/UnitsApi.cpp
index f87b2f03a9..e5fdf5fd0d 100644
--- a/src/Base/UnitsApi.cpp
+++ b/src/Base/UnitsApi.cpp
@@ -26,6 +26,7 @@
 # include <unistd.h>
 #endif
 
+#include <memory>
 #include <QString>
 #include "Exception.h"
 #include "UnitsApi.h"
@@ -35,7 +36,6 @@
 #include "UnitsSchemaCentimeters.h"
 #include "UnitsSchemaMmMin.h"
 #include "UnitsSchemaFemMilliMeterNewton.h"
-#include "StdStlTools.h"
 
 #ifndef M_PI
 #define M_PI       3.14159265358979323846
diff --git a/src/Mod/Part/App/GeometryExtension.h b/src/Mod/Part/App/GeometryExtension.h
index 6879a815c1..6ea307b28c 100644
--- a/src/Mod/Part/App/GeometryExtension.h
+++ b/src/Mod/Part/App/GeometryExtension.h
@@ -24,7 +24,6 @@
 #ifndef PART_GEOMETRYEXTENSION_H
 #define PART_GEOMETRYEXTENSION_H
 
-#include <Base/StdStlTools.h>
 #include <Base/Persistence.h>
 #include <memory>
 #include <string>
diff --git a/src/Mod/Sketcher/App/SketchObjectPyImp.cpp b/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
index 45a074abc4..4a464b9a92 100644
--- a/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
+++ b/src/Mod/Sketcher/App/SketchObjectPyImp.cpp
@@ -27,8 +27,6 @@
 # include <memory>
 #endif
 
-#include <Base/StdStlTools.h>
-
 #include <Mod/Sketcher/App/SketchObject.h>
 #include <Mod/Part/App/LinePy.h>
 #include <Mod/Part/App/Geometry.h>
diff --git a/src/Mod/Spreadsheet/App/Cell.cpp b/src/Mod/Spreadsheet/App/Cell.cpp
index 756f1e7322..f58fbb89c6 100644
--- a/src/Mod/Spreadsheet/App/Cell.cpp
+++ b/src/Mod/Spreadsheet/App/Cell.cpp
@@ -38,7 +38,6 @@
 #include <Base/UnitsApi.h>
 #include <Base/Writer.h>
 #include <Base/Console.h>
-#include <Base/StdStlTools.h>
 #include <App/ExpressionParser.h>
 #include "Sheet.h"
 #include <iomanip>