diff --git a/libs/vkd3d-shader/glsl.c b/libs/vkd3d-shader/glsl.c
index 8a897351..51dd8f88 100644
--- a/libs/vkd3d-shader/glsl.c
+++ b/libs/vkd3d-shader/glsl.c
@@ -1056,6 +1056,7 @@ static void vkd3d_glsl_handle_instruction(struct vkd3d_glsl_generator *gen,
     switch (ins->opcode)
     {
         case VKD3DSIH_ADD:
+        case VKD3DSIH_IADD:
             shader_glsl_binop(gen, ins, "+");
             break;
         case VKD3DSIH_AND:
diff --git a/tests/hlsl/non-const-indexing.shader_test b/tests/hlsl/non-const-indexing.shader_test
index 66b902bd..0b9cebf1 100644
--- a/tests/hlsl/non-const-indexing.shader_test
+++ b/tests/hlsl/non-const-indexing.shader_test
@@ -77,16 +77,16 @@ float4 main() : SV_TARGET
 
 [test]
 uniform 0 float 0
-todo(sm<4 | glsl) draw quad
+todo(sm<4) draw quad
 probe (0, 0) rgba (21.0, 1.0, 24.0, 0.0)
 uniform 0 float 1
-todo(sm<4 | glsl) draw quad
+todo(sm<4) draw quad
 probe (0, 0) rgba (22.0, 0.0, 23.0, 1.0)
 uniform 0 float 2
-todo(sm<4 | glsl) draw quad
+todo(sm<4) draw quad
 probe (0, 0) rgba (23.0, 1.0, 22.0, 0.0)
 uniform 0 float 3
-todo(sm<4 | glsl) draw quad
+todo(sm<4) draw quad
 probe (0, 0) rgba (24.0, 0.0, 21.0, 1.0)