diff --git a/package/avm/ripperx/ripperx.conf b/package/avm/ripperx/ripperx.conf
index 299f812c4..442539668 100644
--- a/package/avm/ripperx/ripperx.conf
+++ b/package/avm/ripperx/ripperx.conf
@@ -1,2 +1,4 @@
 
-export CFLAGS="-fno-unit-at-a-time"
+# this is only supported by gcc34+
+[ "$ROCKCFG_DEFAULT_CC" == "gcc34" ] && \
+	export CFLAGS="-fno-unit-at-a-time"