diff --git a/include/vkd3d_shader.h b/include/vkd3d_shader.h
index 96d05453..0dd9829d 100644
--- a/include/vkd3d_shader.h
+++ b/include/vkd3d_shader.h
@@ -767,7 +767,7 @@ int vkd3d_shader_scan(const struct vkd3d_shader_compile_info *compile_info, char
 void vkd3d_shader_free_scan_descriptor_info(struct vkd3d_shader_scan_descriptor_info *scan_descriptor_info);
 
 int vkd3d_shader_parse_input_signature(const struct vkd3d_shader_code *dxbc,
-        struct vkd3d_shader_signature *signature);
+        struct vkd3d_shader_signature *signature, char **messages);
 struct vkd3d_shader_signature_element *vkd3d_shader_find_signature_element(
         const struct vkd3d_shader_signature *signature, const char *semantic_name,
         unsigned int semantic_index, unsigned int stream_index);
@@ -798,7 +798,7 @@ typedef void (*PFN_vkd3d_shader_free_scan_descriptor_info)(
         struct vkd3d_shader_scan_descriptor_info *scan_descriptor_info);
 
 typedef int (*PFN_vkd3d_shader_parse_input_signature)(const struct vkd3d_shader_code *dxbc,
-        struct vkd3d_shader_signature *signature);
+        struct vkd3d_shader_signature *signature, char **messages);
 typedef struct vkd3d_shader_signature_element * (*PFN_vkd3d_shader_find_signature_element)(
         const struct vkd3d_shader_signature *signature, const char *semantic_name,
         unsigned int semantic_index, unsigned int stream_index);
diff --git a/libs/vkd3d-shader/dxbc.c b/libs/vkd3d-shader/dxbc.c
index f738abe2..a00dbe99 100644
--- a/libs/vkd3d-shader/dxbc.c
+++ b/libs/vkd3d-shader/dxbc.c
@@ -2132,17 +2132,13 @@ static int isgn_handler(const char *data, DWORD data_size, DWORD tag, void *ctx)
 }
 
 int shader_parse_input_signature(const void *dxbc, size_t dxbc_length,
-        struct vkd3d_shader_signature *signature)
+        struct vkd3d_shader_message_context *message_context, struct vkd3d_shader_signature *signature)
 {
-    struct vkd3d_shader_message_context message_context;
     int ret;
 
     memset(signature, 0, sizeof(*signature));
-    if (!vkd3d_shader_message_context_init(&message_context, VKD3D_SHADER_LOG_NONE, NULL))
-        return VKD3D_ERROR;
-    if ((ret = parse_dxbc(dxbc, dxbc_length, &message_context, isgn_handler, signature)) < 0)
+    if ((ret = parse_dxbc(dxbc, dxbc_length, message_context, isgn_handler, signature)) < 0)
         ERR("Failed to parse input signature.\n");
-    vkd3d_shader_message_context_cleanup(&message_context);
 
     return ret;
 }
diff --git a/libs/vkd3d-shader/vkd3d_shader_main.c b/libs/vkd3d-shader/vkd3d_shader_main.c
index 5d504875..6511a89d 100644
--- a/libs/vkd3d-shader/vkd3d_shader_main.c
+++ b/libs/vkd3d-shader/vkd3d_shader_main.c
@@ -971,11 +971,26 @@ void vkd3d_shader_free_root_signature(struct vkd3d_shader_versioned_root_signatu
 }
 
 int vkd3d_shader_parse_input_signature(const struct vkd3d_shader_code *dxbc,
-        struct vkd3d_shader_signature *signature)
+        struct vkd3d_shader_signature *signature, char **messages)
 {
-    TRACE("dxbc {%p, %zu}, signature %p.\n", dxbc->code, dxbc->size, signature);
+    struct vkd3d_shader_message_context message_context;
+    int ret;
 
-    return shader_parse_input_signature(dxbc->code, dxbc->size, signature);
+    TRACE("dxbc {%p, %zu}, signature %p, messages %p.\n", dxbc->code, dxbc->size, signature, messages);
+
+    if (messages)
+        *messages = NULL;
+    if (!vkd3d_shader_message_context_init(&message_context, VKD3D_SHADER_LOG_INFO, NULL))
+        return VKD3D_ERROR;
+
+    ret = shader_parse_input_signature(dxbc->code, dxbc->size, &message_context, signature);
+    vkd3d_shader_message_context_trace_messages(&message_context);
+    if (messages && !(*messages = vkd3d_shader_message_context_copy_messages(&message_context)))
+        ret = VKD3D_ERROR_OUT_OF_MEMORY;
+
+    vkd3d_shader_message_context_cleanup(&message_context);
+
+    return ret;
 }
 
 struct vkd3d_shader_signature_element *vkd3d_shader_find_signature_element(
diff --git a/libs/vkd3d-shader/vkd3d_shader_private.h b/libs/vkd3d-shader/vkd3d_shader_private.h
index ae2f6c2f..79056b38 100644
--- a/libs/vkd3d-shader/vkd3d_shader_private.h
+++ b/libs/vkd3d-shader/vkd3d_shader_private.h
@@ -840,7 +840,7 @@ int shader_extract_from_dxbc(const void *dxbc, size_t dxbc_length,
 void free_shader_desc(struct vkd3d_shader_desc *desc) DECLSPEC_HIDDEN;
 
 int shader_parse_input_signature(const void *dxbc, size_t dxbc_length,
-        struct vkd3d_shader_signature *signature) DECLSPEC_HIDDEN;
+        struct vkd3d_shader_message_context *message_context, struct vkd3d_shader_signature *signature) DECLSPEC_HIDDEN;
 
 struct vkd3d_dxbc_compiler;
 
diff --git a/libs/vkd3d/state.c b/libs/vkd3d/state.c
index 93f22ce0..449f242d 100644
--- a/libs/vkd3d/state.c
+++ b/libs/vkd3d/state.c
@@ -2316,7 +2316,7 @@ static HRESULT d3d12_pipeline_state_init_graphics(struct d3d12_pipeline_state *s
         switch (shader_stages[i].stage)
         {
             case VK_SHADER_STAGE_VERTEX_BIT:
-                if ((ret = vkd3d_shader_parse_input_signature(&dxbc, &input_signature)) < 0)
+                if ((ret = vkd3d_shader_parse_input_signature(&dxbc, &input_signature, NULL)) < 0)
                 {
                     hr = hresult_from_vkd3d_result(ret);
                     goto fail;
diff --git a/tests/vkd3d_shader_api.c b/tests/vkd3d_shader_api.c
index be63b393..69779450 100644
--- a/tests/vkd3d_shader_api.c
+++ b/tests/vkd3d_shader_api.c
@@ -134,7 +134,7 @@ static void test_vkd3d_shader_pfns(void)
     pfn_vkd3d_shader_free_root_signature(&root_signature_desc);
     pfn_vkd3d_shader_free_shader_code(&dxbc);
 
-    rc = pfn_vkd3d_shader_parse_input_signature(&vs, &signature);
+    rc = pfn_vkd3d_shader_parse_input_signature(&vs, &signature, NULL);
     ok(rc == VKD3D_OK, "Got unexpected error code %d.\n", rc);
     element = pfn_vkd3d_shader_find_signature_element(&signature, "position", 0, 0);
     ok(element, "Could not find shader signature element.\n");