diff --git a/pkg/worker/caged/libretro/nanoarch/nanoarch.go b/pkg/worker/caged/libretro/nanoarch/nanoarch.go
index 0b357df42..6dde2f05c 100644
--- a/pkg/worker/caged/libretro/nanoarch/nanoarch.go
+++ b/pkg/worker/caged/libretro/nanoarch/nanoarch.go
@@ -612,7 +612,7 @@ func coreInputState(port C.unsigned, device C.unsigned, index C.unsigned, id C.u
 
 	switch device {
 	case C.RETRO_DEVICE_JOYPAD:
-		return Nan0.Handlers.OnKeyPress(uint(port), int(id)) // 0 1
+		return C.int16_t(Nan0.Handlers.OnKeyPress(uint(port), int(id))) // 0 1
 	case C.RETRO_DEVICE_ANALOG:
 		switch index {
 		case C.RETRO_DEVICE_INDEX_ANALOG_LEFT: