diff --git a/src/d_player.h b/src/d_player.h
index eb0372832..0e0f623d3 100644
--- a/src/d_player.h
+++ b/src/d_player.h
@@ -51,7 +51,8 @@ typedef enum
 	SF_NONIGHTSSUPER    = 1<<15, // Disable super colors for NiGHTS (if you have SF_SUPER)
 	SF_NOSUPERSPRITES   = 1<<16, // Don't use super sprites while super
 	SF_NOSUPERJUMPBOOST = 1<<17, // Disable the jump boost given while super (i.e. Knuckles)
-	SF_CANBUSTWALLS		= 1<<18, // Can naturally bust walls on contact? (i.e. Knuckles)
+	SF_CANBUSTWALLS     = 1<<18, // Can naturally bust walls on contact? (i.e. Knuckles)
+	SF_NOSHIELDABILITY  = 1<<19, // Disable shield abilities
 	// free up to and including 1<<31
 } skinflags_t;