diff --git a/libusbdrivers/src/services.h b/libusbdrivers/src/services.h
index 274b5aa..0e9e02f 100644
--- a/libusbdrivers/src/services.h
+++ b/libusbdrivers/src/services.h
@@ -41,7 +41,7 @@ static inline void usb_free(void *ptr)
 
     if (ps_malloc_ops && ps_malloc_ops->free) {
         ret = ps_free(ps_malloc_ops, 1, ptr);
-        if (!ret) {
+        if (ret) {
             ZF_LOGF("Free error\n");
         }
     } else {