diff --git a/test/libyul/DominatorTest.cpp b/test/libyul/DominatorTest.cpp
index 542037939..9c9bfe86f 100644
--- a/test/libyul/DominatorTest.cpp
+++ b/test/libyul/DominatorTest.cpp
@@ -90,7 +90,7 @@ protected:
 		{
 			return {_pair.first.name, _pair.second};
 		};
-		return _vertexIndices | ranges::views::transform(convertIndex) | ranges::to<std::map>;
+		return _vertexIndices | ranges::views::transform(convertIndex) | ranges::to<std::map<std::string, size_t>>;
 	}
 };