diff --git a/src/Image/Image_PixMap.cxx b/src/Image/Image_PixMap.cxx
index c211b73216..a0927fd422 100644
--- a/src/Image/Image_PixMap.cxx
+++ b/src/Image/Image_PixMap.cxx
@@ -17,6 +17,9 @@
 // purpose or non-infringement. Please see the License for the specific terms
 // and conditions governing the rights and limitations under the License.
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
 
 #ifdef HAVE_FREEIMAGE
   #include <FreeImagePlus.h>
diff --git a/src/OpenGl/OpenGl_Display_1.cxx b/src/OpenGl/OpenGl_Display_1.cxx
index 208fe4df59..52e2bee420 100644
--- a/src/OpenGl/OpenGl_Display_1.cxx
+++ b/src/OpenGl/OpenGl_Display_1.cxx
@@ -28,6 +28,10 @@
 #include <OpenGl_PrinterContext.hxx>
 #include <OpenGl_AspectText.hxx>
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #ifdef HAVE_GL2PS
 #include <gl2ps.h>
 #endif
diff --git a/src/OpenGl/OpenGl_Display_2.cxx b/src/OpenGl/OpenGl_Display_2.cxx
index 40ca648bb5..4bc0f370fb 100644
--- a/src/OpenGl/OpenGl_Display_2.cxx
+++ b/src/OpenGl/OpenGl_Display_2.cxx
@@ -22,6 +22,10 @@
 
 #include <OpenGl_Display.hxx>
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #ifdef HAVE_GL2PS
   #include <gl2ps.h>
 #endif
diff --git a/src/OpenGl/OpenGl_GraphicDriver_Export.cxx b/src/OpenGl/OpenGl_GraphicDriver_Export.cxx
index b62dc9ab48..fbcfa9887a 100755
--- a/src/OpenGl/OpenGl_GraphicDriver_Export.cxx
+++ b/src/OpenGl/OpenGl_GraphicDriver_Export.cxx
@@ -22,6 +22,10 @@
 #include <OpenGl_GraphicDriver.hxx>
 #include <OSD_Localizer.hxx>
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #ifdef HAVE_GL2PS
 #include <gl2ps.h>
 #endif
diff --git a/src/OpenGl/OpenGl_Workspace_2.cxx b/src/OpenGl/OpenGl_Workspace_2.cxx
index cf786a5494..c3ec00fdb9 100644
--- a/src/OpenGl/OpenGl_Workspace_2.cxx
+++ b/src/OpenGl/OpenGl_Workspace_2.cxx
@@ -24,6 +24,10 @@
 #include <TColStd_Array2OfReal.hxx>
 #include <OpenGl_telem_util.hxx>
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #ifdef HAVE_FREEIMAGE
   #include <NCollection_Handle.hxx>
   #include <FreeImagePlus.h>
diff --git a/src/OpenGl/OpenGl_Workspace_3.cxx b/src/OpenGl/OpenGl_Workspace_3.cxx
index 74d2827f3e..be9007e87d 100644
--- a/src/OpenGl/OpenGl_Workspace_3.cxx
+++ b/src/OpenGl/OpenGl_Workspace_3.cxx
@@ -27,6 +27,10 @@
 #include <OpenGl_AspectLine.hxx>
 #include <OpenGl_Structure.hxx>
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 #ifdef HAVE_GL2PS
   #include <gl2ps.h>
 #endif
diff --git a/src/OpenGl/OpenGl_Workspace_5.cxx b/src/OpenGl/OpenGl_Workspace_5.cxx
index 33ab16b82c..eb42adccca 100644
--- a/src/OpenGl/OpenGl_Workspace_5.cxx
+++ b/src/OpenGl/OpenGl_Workspace_5.cxx
@@ -27,6 +27,10 @@
 #include <OpenGl_AspectMarker.hxx>
 #include <OpenGl_AspectText.hxx>
 
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
 /* OCC22218 NOTE: project dependency on gl2ps is specified by macro */
 #ifdef HAVE_GL2PS
   #include <gl2ps.h>