diff --git a/src/p_map.cpp b/src/p_map.cpp
index b904dc1d4..3f0edc8d7 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -2501,8 +2501,8 @@ bool P_TryMove(AActor *thing, const DVector2 &pos,
 DEFINE_ACTION_FUNCTION(AActor, TryMove)
 {
 	PARAM_SELF_PROLOGUE(AActor);
-	PARAM_FLOAT_DEF(x);
-	PARAM_FLOAT_DEF(y);
+	PARAM_FLOAT(x);
+	PARAM_FLOAT(y);
 	PARAM_INT(dropoff);
 	ACTION_RETURN_BOOL(P_TryMove(self, DVector2(x, y), dropoff));
 }