diff --git a/BaseBuild/crosschain/glibc b/BaseBuild/crosschain/glibc
index ae195b3..b5b2b27 100644
--- a/BaseBuild/crosschain/glibc
+++ b/BaseBuild/crosschain/glibc
@@ -136,7 +136,9 @@ mk() {
 			    --with-binutils=/cross-tools/bin \
 			    --with-headers=/tools/include \
 			    --cache-file=config.cache
-	echo "CFLAGS += -march=$ARCH" >configparms
+	if [ ! ${MK64BIT} == "true" ]; then
+		echo "CFLAGS += -march=$ARCH" >configparms
+	fi
 	make -j $NUMCPU
 	make -j $NUMCPU install
 }