diff --git a/kimgio/webp.cpp b/kimgio/webp.cpp
index 2bf3f0df..23c21e05 100644
--- a/kimgio/webp.cpp
+++ b/kimgio/webp.cpp
@@ -120,7 +120,10 @@ bool WebPHandler::write(const QImage &image)
         return false;
     }
 
-    device()->write(reinterpret_cast<const char*>(output), size);
+    if (device()->write(reinterpret_cast<const char*>(output), size) != size) {
+        WebPFree(output);
+        return false;
+    }
     WebPFree(output);
 
     return true;