diff --git a/candle-metal-kernels/src/binary.metal b/candle-metal-kernels/src/binary.metal
index eb560f16..ae11286a 100644
--- a/candle-metal-kernels/src/binary.metal
+++ b/candle-metal-kernels/src/binary.metal
@@ -73,7 +73,7 @@ BINARY(FN, uint32_t, uint8_t, NAME##_u32, NAME##_u32_strided); \
 BINARY(FN, uint8_t, uint8_t, NAME##_u8, NAME##_u8_strided);
 
 #define INT64_BINARY_OP_OUT(NAME, FN) \
-BINARY(FN, int64_t, int8_t, NAME##_i64, NAME##_i64_strided);
+BINARY(FN, int64_t, uint8_t, NAME##_i64, NAME##_i64_strided);
 
 BINARY_OP(x + y, add)
 BINARY_OP(x - y, sub)