diff --git a/src/d_main.cpp b/src/d_main.cpp
index 65973e3c8..0241ac251 100644
--- a/src/d_main.cpp
+++ b/src/d_main.cpp
@@ -504,7 +504,7 @@ CUSTOM_CVAR(Int, compatmode, 0, CVAR_ARCHIVE|CVAR_NOINITCALL)
 		break;
 
 	case 3: // Boom compat mode
-		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL;
+		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL|COMPATF_MISSILECLIP;
 		break;
 
 	case 4: // Old ZDoom compat mode
@@ -512,7 +512,7 @@ CUSTOM_CVAR(Int, compatmode, 0, CVAR_ARCHIVE|CVAR_NOINITCALL)
 		break;
 
 	case 5: // MBF compat mode
-		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL|COMPATF_MUSHROOM|
+		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL|COMPATF_MISSILECLIP|COMPATF_MUSHROOM|
 			COMPATF_MBFMONSTERMOVE|COMPATF_NOBLOCKFRIENDS;
 		break;