diff --git a/src/gtk/descrip.mms b/src/gtk/descrip.mms
index de7b028ddf..6481083cc2 100644
--- a/src/gtk/descrip.mms
+++ b/src/gtk/descrip.mms
@@ -122,7 +122,7 @@ SOURCES =\
 	gauge.cpp,\
 	gdiobj.cpp,\
         glcanvas.cpp,\
-	gsockgtk.c,\
+	gsockgtk.cpp,\
         icon.cpp,\
 	listbox.cpp,\
 	main.cpp,\
@@ -198,7 +198,7 @@ frame.obj : frame.cpp
 gauge.obj : gauge.cpp
 gdiobj.obj : gdiobj.cpp
 glcanvas.obj : glcanvas.cpp
-gsockgtk.obj : gsockgtk.c
+gsockgtk.obj : gsockgtk.cpp
 icon.obj : icon.cpp
 listbox.obj : listbox.cpp
 main.obj : main.cpp
diff --git a/src/gtk1/descrip.mms b/src/gtk1/descrip.mms
index de7b028ddf..6481083cc2 100644
--- a/src/gtk1/descrip.mms
+++ b/src/gtk1/descrip.mms
@@ -122,7 +122,7 @@ SOURCES =\
 	gauge.cpp,\
 	gdiobj.cpp,\
         glcanvas.cpp,\
-	gsockgtk.c,\
+	gsockgtk.cpp,\
         icon.cpp,\
 	listbox.cpp,\
 	main.cpp,\
@@ -198,7 +198,7 @@ frame.obj : frame.cpp
 gauge.obj : gauge.cpp
 gdiobj.obj : gdiobj.cpp
 glcanvas.obj : glcanvas.cpp
-gsockgtk.obj : gsockgtk.c
+gsockgtk.obj : gsockgtk.cpp
 icon.obj : icon.cpp
 listbox.obj : listbox.cpp
 main.obj : main.cpp
diff --git a/src/motif/descrip.mms b/src/motif/descrip.mms
index 63594919fd..caa5d6dfda 100644
--- a/src/motif/descrip.mms
+++ b/src/motif/descrip.mms
@@ -104,7 +104,7 @@ SOURCES = \
 		frame.cpp,\
 		gauge.cpp,\
 		gdiobj.cpp,\
-		gsockmot.c,\
+		gsockmot.cpp,\
 		icon.cpp,\
 		listbox.cpp,\
 		main.cpp,\
@@ -166,7 +166,7 @@ font.obj : font.cpp
 frame.obj : frame.cpp
 gauge.obj : gauge.cpp
 gdiobj.obj : gdiobj.cpp
-gsockmot.obj : gsockmot.c
+gsockmot.obj : gsockmot.cpp
 icon.obj : icon.cpp
 listbox.obj : listbox.cpp
 main.obj : main.cpp
diff --git a/src/unix/descrip.mms b/src/unix/descrip.mms
index eba15815b7..b02e9272fc 100644
--- a/src/unix/descrip.mms
+++ b/src/unix/descrip.mms
@@ -58,7 +58,7 @@ SOURCES =       baseunix.cpp,\
 		dir.cpp,\
 		fontenum.cpp,\
 		fontutil.cpp,\
-		gsocket.c,\
+		gsocket.cpp,\
 		mimetype.cpp,\
 		threadpsx.cpp,\
 		utilsunx.cpp,\
@@ -88,7 +88,8 @@ dialup.obj : dialup.cpp
 dir.obj : dir.cpp
 fontenum.obj : fontenum.cpp
 fontutil.obj : fontutil.cpp
-gsocket.obj : gsocket.c
+gsocket.obj : gsocket.cpp
+	cxx $(CXXFLAGS)$(CXX_DEFINE)/nowarn gsocket.cpp
 mimetype.obj : mimetype.cpp
 threadpsx.obj : threadpsx.cpp
 utilsunx.obj : utilsunx.cpp