diff --git a/configure/CONFIG.gnuCommon b/configure/CONFIG.gnuCommon
index 3d557e0ba..c0f8dbeea 100644
--- a/configure/CONFIG.gnuCommon
+++ b/configure/CONFIG.gnuCommon
@@ -40,3 +40,4 @@ SHRLIB_LDFLAGS_NO =
 
 DEPENDS_FLAG = -MM
 
+CPPSNCFLAGS += -x c