--- a/Makefile.in
+++ b/Makefile.in
@@ -1,7 +1,7 @@
 
 CC	= @CC@ -fPIC
 CFLAGS	= @CFLAGS@
-COMPILE  = $(CC) $(CFLAGS) $(INCLUDES)
+COMPILE  = $(CC) $(CFLAGS) $(CPPFLAGS) $(INCLUDES)
 
 LD	= @CC@
 LDFLAGS	= @LDFLAGS@