diff --git a/libs/vkd3d-shader/hlsl.h b/libs/vkd3d-shader/hlsl.h
index 75a1e6e4..8bc72a8a 100644
--- a/libs/vkd3d-shader/hlsl.h
+++ b/libs/vkd3d-shader/hlsl.h
@@ -356,6 +356,7 @@ struct hlsl_attribute
 #define HLSL_MODIFIER_COLUMN_MAJOR   0x00000400
 #define HLSL_STORAGE_IN              0x00000800
 #define HLSL_STORAGE_OUT             0x00001000
+#define HLSL_MODIFIER_INLINE         0x00002000
 
 #define HLSL_TYPE_MODIFIERS_MASK     (HLSL_MODIFIER_PRECISE | HLSL_MODIFIER_VOLATILE | \
                                       HLSL_MODIFIER_CONST | HLSL_MODIFIER_ROW_MAJOR | \
diff --git a/libs/vkd3d-shader/hlsl.y b/libs/vkd3d-shader/hlsl.y
index 2fd8ceb9..43ea4b4d 100644
--- a/libs/vkd3d-shader/hlsl.y
+++ b/libs/vkd3d-shader/hlsl.y
@@ -5129,6 +5129,9 @@ func_prototype_no_attrs:
             struct hlsl_ir_var *var;
             struct hlsl_type *type;
 
+            /* Functions are unconditionally inlined. */
+            modifiers &= ~HLSL_MODIFIER_INLINE;
+
             if (modifiers & ~HLSL_MODIFIERS_MAJORITY_MASK)
                 hlsl_error(ctx, &@1, VKD3D_SHADER_ERROR_HLSL_INVALID_MODIFIER,
                         "Only majority modifiers are allowed on functions.");
@@ -5970,6 +5973,10 @@ var_modifiers:
         {
             $$ = add_modifiers(ctx, $2, HLSL_STORAGE_IN | HLSL_STORAGE_OUT, &@1);
         }
+    | KW_INLINE var_modifiers
+        {
+            $$ = add_modifiers(ctx, $2, HLSL_MODIFIER_INLINE, &@1);
+        }
 
 
 complex_initializer:
diff --git a/tests/hlsl/function.shader_test b/tests/hlsl/function.shader_test
index 9573d0a9..0db0477e 100644
--- a/tests/hlsl/function.shader_test
+++ b/tests/hlsl/function.shader_test
@@ -298,7 +298,7 @@ probe all rgba (2.0, 3.0, 6.0, 7.0)
 
 % Inline modifier
 
-[pixel shader todo]
+[pixel shader]
 inline float func(float a)
 {
     return a + 1;
@@ -312,12 +312,12 @@ float4 main() : sv_target
 }
 
 [test]
-todo draw quad
-todo probe all rgba (2.0, 3.0, 6.0, 7.0)
+draw quad
+probe all rgba (2.0, 3.0, 6.0, 7.0)
 
 % Inline modifier used on entry point
 
-[pixel shader todo]
+[pixel shader]
 float func(float a)
 {
     return a + 1;
@@ -331,5 +331,5 @@ inline float4 main() : sv_target
 }
 
 [test]
-todo draw quad
-todo probe all rgba (2.0, 3.0, 6.0, 7.0)
+draw quad
+probe all rgba (2.0, 3.0, 6.0, 7.0)