diff --git a/maven-wrapper-distribution/src/resources/only-mvnw b/maven-wrapper-distribution/src/resources/only-mvnw
index e9c85c8..6620a5c 100755
--- a/maven-wrapper-distribution/src/resources/only-mvnw
+++ b/maven-wrapper-distribution/src/resources/only-mvnw
@@ -82,7 +82,8 @@ set_java_home() {
 hash_string() {
   str="${1:-}" h=0
   while [ -n "$str" ]; do
-    h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$str")) % 4294967296))
+    char="${str%"${str#?}"}"
+    h=$(((h * 31 + $(LC_CTYPE=C printf %d "'$char")) % 4294967296))
     str="${str#?}"
   done
   printf %x\\n $h