diff --git a/libs/vkd3d-shader/hlsl.c b/libs/vkd3d-shader/hlsl.c
index 7f71b565..3ee97ca6 100644
--- a/libs/vkd3d-shader/hlsl.c
+++ b/libs/vkd3d-shader/hlsl.c
@@ -1422,6 +1422,8 @@ static bool clone_block(struct hlsl_ctx *ctx, struct hlsl_block *dst_block,
     const struct hlsl_ir_node *src;
     struct hlsl_ir_node *dst;
 
+    hlsl_block_init(dst_block);
+
     LIST_FOR_EACH_ENTRY(src, &src_block->instrs, struct hlsl_ir_node, entry)
     {
         if (!(dst = clone_instr(ctx, map, src)))
diff --git a/libs/vkd3d-shader/hlsl_codegen.c b/libs/vkd3d-shader/hlsl_codegen.c
index c41e88ec..8bde17fe 100644
--- a/libs/vkd3d-shader/hlsl_codegen.c
+++ b/libs/vkd3d-shader/hlsl_codegen.c
@@ -721,7 +721,6 @@ static bool lower_calls(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *
         hlsl_error(ctx, &call->node.loc, VKD3D_SHADER_ERROR_HLSL_NOT_DEFINED,
                 "Function \"%s\" is not defined.", decl->func->name);
 
-    hlsl_block_init(&block);
     if (!hlsl_clone_block(ctx, &block, &decl->body))
         return false;
     list_move_before(&call->node.entry, &block.instrs);