diff --git a/src/compiler/nir/nir_opcodes.py b/src/compiler/nir/nir_opcodes.py
index 42bcfb66569..9202a2e5398 100644
--- a/src/compiler/nir/nir_opcodes.py
+++ b/src/compiler/nir/nir_opcodes.py
@@ -770,8 +770,8 @@ binop("uhadd", tuint, _2src_commutative, "(src0 & src1) + ((src0 ^ src1) >> 1)")
 #
 # (x + y + 1) >> 1 = (x | y) + (-(x ^ y) + 1) >> 1)
 #                  = (x | y) -  ((x ^ y)      >> 1)
-binop("irhadd", tint, _2src_commutative, "(src0 | src1) + ((src0 ^ src1) >> 1)")
-binop("urhadd", tuint, _2src_commutative, "(src0 | src1) + ((src0 ^ src1) >> 1)")
+binop("irhadd", tint, _2src_commutative, "(src0 | src1) - ((src0 ^ src1) >> 1)")
+binop("urhadd", tuint, _2src_commutative, "(src0 | src1) - ((src0 ^ src1) >> 1)")
 
 binop("umod", tuint, "", "src1 == 0 ? 0 : src0 % src1")