diff --git a/src/App/PreCompiled.h b/src/App/PreCompiled.h
index 046783405f..86389849a5 100644
--- a/src/App/PreCompiled.h
+++ b/src/App/PreCompiled.h
@@ -49,6 +49,7 @@
 #include <csignal>
 #include <cstdio>
 #include <ctime>
+#include <cfloat>
 
 #ifdef FC_OS_WIN32
 # include <crtdbg.h>
diff --git a/src/Mod/Mesh/Gui/PreCompiled.h b/src/Mod/Mesh/Gui/PreCompiled.h
index e492cbd9aa..8e9b804a4e 100644
--- a/src/Mod/Mesh/Gui/PreCompiled.h
+++ b/src/Mod/Mesh/Gui/PreCompiled.h
@@ -44,6 +44,7 @@
 
 // standard
 #include <ios>
+#include <cfloat>
 
 // STL
 #include <algorithm>
diff --git a/src/Mod/Part/Gui/PreCompiled.h b/src/Mod/Part/Gui/PreCompiled.h
index f88b6d206d..4758d16e94 100644
--- a/src/Mod/Part/Gui/PreCompiled.h
+++ b/src/Mod/Part/Gui/PreCompiled.h
@@ -62,13 +62,8 @@
 #include <boost/regex.hpp>
 #include <boost/algorithm/string/predicate.hpp>
 
-// Qt Toolkit
-#ifndef __QtAll__
-# include <Gui/QtAll.h>
-#endif
-
 // GL
-// Include glext before InventorAll
+// Include glext before QtAll/InventorAll
 #ifdef FC_OS_WIN32
 # include <GL/gl.h>
 # include <GL/glext.h>
@@ -87,6 +82,11 @@
 // Should come after glext.h to avoid warnings
 #include <Inventor/C/glue/gl.h>
 
+// Qt Toolkit
+#ifndef __QtAll__
+# include <Gui/QtAll.h>
+#endif
+
 // Inventor includes OpenGL
 #ifndef __InventorAll__
 # include <Gui/InventorAll.h>