diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 6053ce85a..5ea7dfa07 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -4369,8 +4369,8 @@ enum EACSFunctions
 	ACSF_GetActorFloorTerrain,
 	ACSF_StrArg,
 	ACSF_Floor,
-	ACSF_Ceil,
 	ACSF_Round,
+	ACSF_Ceil,
 
 
 	// OpenGL stuff