diff --git a/libs/vkd3d-shader/msl.c b/libs/vkd3d-shader/msl.c
index aa8abeefb..10ed99283 100644
--- a/libs/vkd3d-shader/msl.c
+++ b/libs/vkd3d-shader/msl.c
@@ -1460,6 +1460,9 @@ static void msl_handle_instruction(struct msl_generator *gen, const struct vkd3d
 
     switch (ins->opcode)
     {
+        case VSIR_OP_ACOS:
+            msl_intrinsic(gen, ins, "acos");
+            break;
         case VSIR_OP_ADD:
         case VSIR_OP_IADD:
             msl_binop(gen, ins, "+");
diff --git a/tests/hlsl/inverse-trig.shader_test b/tests/hlsl/inverse-trig.shader_test
index 4572f42aa..3474e1b45 100644
--- a/tests/hlsl/inverse-trig.shader_test
+++ b/tests/hlsl/inverse-trig.shader_test
@@ -13,24 +13,24 @@ float4 main() : sv_target
 
 [test]
 uniform 0 float4 -1.0 0.0 0.0 0.0
-todo(msl & sm>=6) draw quad
-probe (0, 0) rgba (3.14159274, 0.0, 0.0, 0.0) 128
+draw quad
+probe (0, 0) f32(3.14159274, 0.0, 0.0, 0.0) 128
 
 uniform 0 float4 -0.5 0.0 0.0 0.0
-todo(msl & sm>=6) draw quad
-probe (0, 0) rgba (2.094441441, 0.0, 0.0, 0.0) 256
+draw quad
+probe (0, 0) f32(2.094441441, 0.0, 0.0, 0.0) 256
 
 uniform 0 float4 0.0 0.0 0.0 0.0
-todo(msl & sm>=6) draw quad
-probe (0, 0) rgba (1.57072878, 0.0, 0.0, 0.0) 1024
+draw quad
+probe (0, 0) f32(1.57072878, 0.0, 0.0, 0.0) 1024
 
 uniform 0 float4 0.5 0.0 0.0 0.0
-todo(msl & sm>=6) draw quad
-probe (0, 0) rgba (1.04715133, 0.0, 0.0, 0.0) 512
+draw quad
+probe (0, 0) f32(1.04715133, 0.0, 0.0, 0.0) 512
 
 uniform 0 float4 1.0 0.0 0.0 0.0
-todo(msl & sm>=6) draw quad
-probe (0, 0) rgba (0.0, 0.0, 0.0, 0.0) 128
+draw quad
+probe (0, 0) f32(0.0, 0.0, 0.0, 0.0) 128
 
 [pixel shader]
 uniform float4 a;