diff --git a/adm_local/unix/config_files/check_NETGEN.m4 b/adm_local/unix/config_files/check_NETGEN.m4
index b7f3975..27cac8c 100644
--- a/adm_local/unix/config_files/check_NETGEN.m4
+++ b/adm_local/unix/config_files/check_NETGEN.m4
@@ -94,8 +94,8 @@ if test "x$NETGEN_HOME" != "x"; then
   
   CPPFLAGS_old="$CPPFLAGS"
   CXXFLAGS_old="$CXXFLAGS"
-  CPPFLAGS="$NETGEN_INCLUDES $CAS_CPPFLAGS $CPPFLAGS"
-  CXXFLAGS="$NETGEN_INCLUDES $CAS_CPPFLAGS $CXXFLAGS"
+  CPPFLAGS="$CAS_CPPFLAGS $NETGEN_INCLUDES $CPPFLAGS"
+  CXXFLAGS="$CAS_CPPFLAGS $NETGEN_INCLUDES $CXXFLAGS"
 
   AC_MSG_CHECKING(for Netgen header file)