diff --git a/src/makeg95.env b/src/makeg95.env
index 223c31c385..64c74fa705 100644
--- a/src/makeg95.env
+++ b/src/makeg95.env
@@ -291,11 +291,14 @@ ifeq ($(wxUSE_GUI),1)
 endif
 LDFLAGS = $(WINDOWSLDFLAGS) $(COMMON_THREADFLAGS) -L$(WXDIR)/lib -L$(WXDIR)/contrib/lib $(EXTRALDFLAGS)
 
-.SUFFIXES: .rc .$(RESSUFF) .$(RSCSUFF) .cpp .cxx .c
+.SUFFIXES: .rc .$(RESSUFF) .$(RSCSUFF) .cpp .cxx .cc .c
 
 .c.o:
 	$(CC) -c $(CFLAGS) -o $@ $*.c
 
+.cc.o:
+	$(CC) -c $(CPPFLAGS) -o $@ $*.cc
+
 .cxx.o:
 	$(CC) -c $(CPPFLAGS) -o $@ $*.cxx