diff --git a/src/p_switch.cpp b/src/p_switch.cpp
index 5aeff7b46..1ca4654b5 100644
--- a/src/p_switch.cpp
+++ b/src/p_switch.cpp
@@ -177,11 +177,11 @@ bool P_CheckSwitchRange(AActor *user, line_t *line, int sideno)
 
 	if ((TexMan.FindSwitch(side->GetTexture(side_t::top))) != NULL)
 	{
-		return (user->z + user->height >= open.top);
+		return (user->z + user->height > open.top);
 	}
 	else if ((TexMan.FindSwitch(side->GetTexture(side_t::bottom))) != NULL)
 	{
-		return (user->z <= open.bottom);
+		return (user->z < open.bottom);
 	}
 	else if ((flags & ML_3DMIDTEX) || (TexMan.FindSwitch(side->GetTexture(side_t::mid))) != NULL)
 	{
@@ -194,7 +194,7 @@ bool P_CheckSwitchRange(AActor *user, line_t *line, int sideno)
 	else
 	{
 		// no switch found. Check whether the player can touch either top or bottom texture
-		return (user->z + user->height >= open.top) || (user->z <= open.bottom);
+		return (user->z + user->height > open.top) || (user->z < open.bottom);
 	}
 }