diff --git a/src/frontend/qt_sdl/Netplay.cpp b/src/frontend/qt_sdl/Netplay.cpp
index aa3a649c..ad32bab0 100644
--- a/src/frontend/qt_sdl/Netplay.cpp
+++ b/src/frontend/qt_sdl/Netplay.cpp
@@ -698,7 +698,7 @@ void ProcessMirrorHost()
                 }*/
                 u32 clientframes = *(u32*)event.packet->data;
 printf("[SYNC] HOST=%d CLIENT=%d\n", NDS::NumFrames, clientframes);
-                if (clientframes > (NDS::NumFrames + 4))
+                if (clientframes < (NDS::NumFrames - 4))
                 {
                     event.peer->data = (void*)1;
                     block = true;