diff --git a/distccflags b/distccflags
index 4bbbaec..c9f60cf 100755
--- a/distccflags
+++ b/distccflags
@@ -59,7 +59,7 @@ fi
 
 get_arch() {
     $CC -Q --help=target "$@" |
-    egrep '\s*-march=' |
+    egrep '\s*-march=  ' |
     awk '{print $2}'
 }