diff --git a/extern/emu2413/emu2413.c b/extern/emu2413/emu2413.c
index a19c2a177..dc2aa9c21 100644
--- a/extern/emu2413/emu2413.c
+++ b/extern/emu2413/emu2413.c
@@ -1233,7 +1233,11 @@ void OPLL_writeReg(OPLL *opll, uint32_t reg, uint8_t data) {
     reg -= 9;
   }
 
-  opll->reg[reg] = (uint8_t)data;
+  // is the compiler stupid or what?
+  // -Wstringop-overflow seems to be the buggiest thing known to humanity...
+  if (reg<0x40) {
+    opll->reg[reg] = (uint8_t)data;
+  }
 
   switch (reg) {
   case 0x00:
diff --git a/extern/emu2413/emu2413.h b/extern/emu2413/emu2413.h
index 9e60590a0..7c10058e5 100644
--- a/extern/emu2413/emu2413.h
+++ b/extern/emu2413/emu2413.h
@@ -96,7 +96,7 @@ typedef struct __OPLL {
   double out_step;
   double out_time;
 
-  uint8_t reg[0x40];
+  uint8_t reg[64];
   uint8_t test_flag;
   uint32_t slot_key_status;
   uint8_t rhythm_mode;