diff --git a/src/p_map.c b/src/p_map.c
index a9d2cf45d..2911e4d40 100644
--- a/src/p_map.c
+++ b/src/p_map.c
@@ -3730,7 +3730,7 @@ void P_SlideMove(mobj_t *mo)
 
 	boolean papercol = false;
 	vertex_t v1, v2; // fake vertexes
-	line_t junk; // fake linedef
+	static line_t junk; // fake linedef
 
 	memset(&junk, 1, sizeof(junk));