diff --git a/bin/pt-mysql-summary b/bin/pt-mysql-summary
index 4365ca4d..3e81af23 100755
--- a/bin/pt-mysql-summary
+++ b/bin/pt-mysql-summary
@@ -88,9 +88,10 @@ usage() {
 
 usage_or_errors() {
    local file="$1"
+   local version=""
 
    if [ "$OPT_VERSION" ]; then
-      local version=$(grep '^pt-[^ ]\+ [0-9]' "$file")
+      version=$(grep '^pt-[^ ]\+ [0-9]' "$file")
       echo "$version"
       return 1
    fi