diff --git a/mupen64plus-core/src/device/r4300/dcache.c b/mupen64plus-core/src/device/r4300/dcache.c
index a3ef038..0147324 100644
--- a/mupen64plus-core/src/device/r4300/dcache.c
+++ b/mupen64plus-core/src/device/r4300/dcache.c
@@ -48,7 +48,7 @@ void dcache_writeback(struct r4300_core* r4300, struct datacache *line)
 
 static void dcache_fill(struct datacache *line, struct r4300_core* r4300, uint32_t address)
 {
-    cp0_dcb_interlock(r4300, 14); // not sure about this
+    cp0_dcb_interlock(r4300, 5);
     line->valid = 1;
     line->dirty = 0;
     line->tag = address & ~UINT32_C(0xFFF);
diff --git a/mupen64plus-core/src/device/r4300/icache.c b/mupen64plus-core/src/device/r4300/icache.c
index 15e446a..bbd3517 100644
--- a/mupen64plus-core/src/device/r4300/icache.c
+++ b/mupen64plus-core/src/device/r4300/icache.c
@@ -53,7 +53,7 @@ void icache_writeback(struct r4300_core* r4300, struct instcache *line)
 
 void icache_fill(struct instcache *line, struct r4300_core* r4300, uint32_t address)
 {
-    cp0_icb_interlock(r4300, 24); // not sure about this
+    cp0_icb_interlock(r4300, 6);
     line->valid = 1;
     line->tag = address & ~UINT32_C(0xFFF);
     r4300->current_access_size = ACCESS_ICACHE;