diff --git a/libs/vkd3d-shader/hlsl.c b/libs/vkd3d-shader/hlsl.c
index ddc690ef..4a8cf696 100644
--- a/libs/vkd3d-shader/hlsl.c
+++ b/libs/vkd3d-shader/hlsl.c
@@ -537,15 +537,13 @@ void hlsl_push_scope(struct hlsl_parse_ctx *ctx)
     list_add_tail(&ctx->scopes, &new_scope->entry);
 }
 
-BOOL hlsl_pop_scope(struct hlsl_parse_ctx *ctx)
+void hlsl_pop_scope(struct hlsl_parse_ctx *ctx)
 {
     struct hlsl_scope *prev_scope = ctx->cur_scope->upper;
 
-    if (!prev_scope)
-        return FALSE;
+    assert(prev_scope);
     TRACE("Popping current scope.\n");
     ctx->cur_scope = prev_scope;
-    return TRUE;
 }
 
 static int compare_param_hlsl_types(const struct hlsl_type *t1, const struct hlsl_type *t2)
diff --git a/libs/vkd3d-shader/hlsl.h b/libs/vkd3d-shader/hlsl.h
index 138ab4ee..656698bb 100644
--- a/libs/vkd3d-shader/hlsl.h
+++ b/libs/vkd3d-shader/hlsl.h
@@ -646,7 +646,7 @@ void hlsl_report_message(const struct source_location loc,
         enum hlsl_error_level level, const char *fmt, ...) VKD3D_PRINTF_FUNC(3,4) DECLSPEC_HIDDEN;
 
 void hlsl_push_scope(struct hlsl_parse_ctx *ctx) DECLSPEC_HIDDEN;
-BOOL hlsl_pop_scope(struct hlsl_parse_ctx *ctx) DECLSPEC_HIDDEN;
+void hlsl_pop_scope(struct hlsl_parse_ctx *ctx) DECLSPEC_HIDDEN;
 
 struct hlsl_type *hlsl_type_clone(struct hlsl_type *old, unsigned int default_majority) DECLSPEC_HIDDEN;
 BOOL hlsl_type_compare(const struct hlsl_type *t1, const struct hlsl_type *t2) DECLSPEC_HIDDEN;