diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp
index 41fdef3ac4..2e1a30744e 100644
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -1761,7 +1761,7 @@ struct KeyParser {
 std::vector<std::unique_ptr<DescriptorImpl>> ParseScript(uint32_t& key_exp_index, Span<const char>& sp, ParseScriptContext ctx, FlatSigningProvider& out, std::string& error)
 {
     using namespace script;
-
+    Assume(ctx == ParseScriptContext::TOP || ctx == ParseScriptContext::P2SH || ctx == ParseScriptContext::P2WSH || ctx == ParseScriptContext::P2TR);
     std::vector<std::unique_ptr<DescriptorImpl>> ret;
     auto expr = Expr(sp);
     if (Func("pk", expr)) {