diff --git a/core/class_db.cpp b/core/class_db.cpp
index 3cd04c65731..65f0c6008c4 100644
--- a/core/class_db.cpp
+++ b/core/class_db.cpp
@@ -389,6 +389,13 @@ uint64_t ClassDB::get_api_hash(APIType p_api) {
 
 			while ((k = t->method_map.next(k))) {
 
+				String name = k->operator String();
+
+				ERR_CONTINUE(name.empty());
+
+				if (name[0] == '_')
+					continue; // Ignore non-virtual methods that start with an underscore
+
 				snames.push_back(*k);
 			}