diff --git a/include/mgba/internal/arm/isa-inlines.h b/include/mgba/internal/arm/isa-inlines.h
index 93659b6d7..1a84aeccf 100644
--- a/include/mgba/internal/arm/isa-inlines.h
+++ b/include/mgba/internal/arm/isa-inlines.h
@@ -34,8 +34,8 @@
 #define ARM_CARRY_FROM(M, N, D) (((uint32_t) (M) >> 31) + ((uint32_t) (N) >> 31) > ((uint32_t) (D) >> 31))
 #define ARM_BORROW_FROM(M, N, D) (((uint32_t) (M)) >= ((uint32_t) (N)))
 #define ARM_BORROW_FROM_CARRY(M, N, D, C) (ARM_UXT_64(M) >= (ARM_UXT_64(N)) + (uint64_t) (C))
-#define ARM_V_ADDITION(M, N, D) (!(ARM_SIGN((M) ^ (N))) && (ARM_SIGN((M) ^ (D))))
-#define ARM_V_SUBTRACTION(M, N, D) ((ARM_SIGN((M) ^ (N))) && (ARM_SIGN((M) ^ (D))))
+#define ARM_V_ADDITION(M, N, D) (ARM_SIGN(~((M) ^ (N)) & ((M) ^ (D))))
+#define ARM_V_SUBTRACTION(M, N, D) (ARM_SIGN(((M) ^ (N)) & ((M) ^ (D))))
 
 #define ARM_WAIT_MUL(R)                                                   \
 	{                                                                     \