diff --git a/source/qjs_blob.c b/source/qjs_blob.c
index b5a25b5d..324b1cf1 100644
--- a/source/qjs_blob.c
+++ b/source/qjs_blob.c
@@ -199,9 +199,12 @@ static JSValue js_blob_write_text(JSContext *ctx, JSValueConst this_val,
   // Handle number or single character string
   const char *str = JS_ToCString(ctx, argv[0]);
 
-  if (blob_write_text(bd, str) < 0)
+  if (blob_write_text(bd, str) < 0) {
+    JS_FreeCString(ctx,str);
     return JS_ThrowTypeError(ctx, "write_kim: cannot write to stone blob or OOM");
+  }
   
+  JS_FreeCString(ctx,str);
   return JS_UNDEFINED;
 }