diff --git a/build-all.sh b/build-all.sh
index 39bfa67..fd87b67 100755
--- a/build-all.sh
+++ b/build-all.sh
@@ -124,7 +124,7 @@ if [ -z "$PREFIX" ]; then
     exit 1
 fi
 if [ -n "$PREFIX_PGO" ] && [ -z "$PGO" ] && [ -z "$FULL_PGO" ]; then
-    echo Unrecognized parameter $1
+    echo Unrecognized parameter $PREFIX_PGO
     exit 1
 fi