diff --git a/test/missiles_test.cpp b/test/missiles_test.cpp
index 1a56600f2..815ffb373 100644
--- a/test/missiles_test.cpp
+++ b/test/missiles_test.cpp
@@ -11,7 +11,7 @@ using ::testing::Lt;
 using ::testing::Pair;
 using ::testing::UnorderedElementsAre;
 
-void TestArrowRotatesUniformly(Missile &missile, int startingFrame, unsigned leftFrame, unsigned rightFrame)
+void TestArrowRotatesUniformly(Missile &missile, int startingFrame, int leftFrame, int rightFrame)
 {
 	std::unordered_map<int, unsigned> observed {};
 	for (auto i = 0; i < 100; i++) {