diff --git a/code/client/cl_keys.c b/code/client/cl_keys.c
index f73083a5..4945497b 100644
--- a/code/client/cl_keys.c
+++ b/code/client/cl_keys.c
@@ -1239,6 +1239,11 @@ void CL_KeyDownEvent( int key, unsigned time )
 
 	if( keys[K_ALT].down && key == K_ENTER )
 	{
+		// don't repeat fullscreen toggle when keys are held down
+		if ( keys[K_ENTER].repeats > 1 ) {
+			return;
+		}
+
 		Cvar_SetValue( "r_fullscreen",
 			!Cvar_VariableIntegerValue( "r_fullscreen" ) );
 		return;