diff --git a/appl/kx/Makefile.in b/appl/kx/Makefile.in
index 59a671bbc..b0a107b92 100644
--- a/appl/kx/Makefile.in
+++ b/appl/kx/Makefile.in
@@ -11,7 +11,8 @@ XLIBS = @X_LIBS@ @LIB_XauReadAuth@ @X_PRE_LIBS@ @X_EXTRA_LIBS@
 CC = @CC@
 AR = ar
 DEFS = @DEFS@
-CFLAGS = $(XINCS) @CFLAGS@
+CFLAGS = @CFLAGS@
+CPPFLAGS= $(XINCS) 
 LD_FLAGS = @LD_FLAGS@
 INSTALL = @INSTALL@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@