diff --git a/configure.in b/configure.in
index b22f3ff29..ed0a37aaa 100644
--- a/configure.in
+++ b/configure.in
@@ -193,6 +193,12 @@ else
   GNUSTEP_LDIR=$GNUSTEP_SYSTEM_ROOT/Libraries/$obj_dir
 fi
 
+#
+# The following one is so that headers of custom libraries into
+# $GNUSTEP_HDIR are used before the standard ones
+#
+CPPFLAGS="$CPPFLAGS -I$GNUSTEP_HDIR"
+
 #--------------------------------------------------------------------
 # Check if Objective-C is installed
 #--------------------------------------------------------------------