diff --git a/src/main.c b/src/main.c
index b4eb2bb29f..2d69e62043 100644
--- a/src/main.c
+++ b/src/main.c
@@ -97,7 +97,10 @@ void AgbMain()
     InitGpuRegManager();
     // Setup waitstates for all ROM mirrors
     if (DECAP_ENABLED && DECAP_MIRRORING)
-        REG_WAITCNT = WAITCNT_PREFETCH_ENABLE | 0x5B4; // WAITCNT_WSX_S_1 | WAITCNT_WSX_N_3
+        REG_WAITCNT = WAITCNT_PREFETCH_ENABLE
+            | WAITCNT_WS0_S_1 | WAITCNT_WS0_N_3
+            | WAITCNT_WS1_S_1 | WAITCNT_WS1_N_3
+            | WAITCNT_WS2_S_1 | WAITCNT_WS2_N_3;
     else
         REG_WAITCNT = WAITCNT_PREFETCH_ENABLE | WAITCNT_WS0_S_1 | WAITCNT_WS0_N_3;
     InitKeys();