diff --git a/configure.ac b/configure.ac
index 4553465914a..0d4426d65be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -410,7 +410,7 @@ if test "x$python" = "xyes"; then
 	if test "x$pythonfound" = "xyes"; then
 		OLD_CPPFLAGS="$CPPFLAGS"
 		OLD_CXXFLAGS="$CXXFLAGS"
-		CPPFLAGS="$CPPFLAGS $PYTHON_CFLAGS $PYTHON_CPPFLAGS"
+		CPPFLAGS="$CPPFLAGS $PYTHON_CPPFLAGS"
 		CXXFLAGS="$CXXFLAGS $PYTHON_CFLAGS"
 
 		AC_SUBST([PYTHON_CFLAGS])