diff --git a/configure b/configure
index 720c7b6ce6..9fe1a733ad 100755
--- a/configure
+++ b/configure
@@ -1474,7 +1474,7 @@ if x86 ; then
                            -e s/xmm/sse/ -e s/kni/sse/`
 
   for ext in $pparam ; do
-    eval _$ext=auto && eval _$ext=yes
+    eval test \$_$ext = auto 2>/dev/null && eval _$ext=yes
   done
 
   # SSE implies MMX2, but not all SSE processors report the mmxext CPU flag.