diff --git a/engine/client/cl_game.c b/engine/client/cl_game.c
index d73cddb8..95f45b15 100644
--- a/engine/client/cl_game.c
+++ b/engine/client/cl_game.c
@@ -2422,7 +2422,7 @@ static void GAME_EXPORT pfnKillEvents( int entnum, const char *eventname )
 	if( eventIndex >= MAX_EVENTS )
 		return;
 
-	if( entnum < 0 || entnum > clgame.maxEntities )
+	if( entnum < 0 || entnum >= clgame.maxEntities )
 		return;
 
 	es = &cl.events;
diff --git a/engine/client/mod_dbghulls.c b/engine/client/mod_dbghulls.c
index 2832c9c4..65a16310 100644
--- a/engine/client/mod_dbghulls.c
+++ b/engine/client/mod_dbghulls.c
@@ -684,7 +684,7 @@ static void Mod_CreatePolygonsForHull( int hullnum )
 	char	name[8];
 	int	i;
 
-	if( hullnum < 0 || hullnum > 3 )
+	if( hullnum < 0 || hullnum >= MAX_MAP_HULLS )
 		return;
 
 	if( !world.num_hull_models )
diff --git a/engine/client/vid_common.c b/engine/client/vid_common.c
index 23007c70..1dbb11ae 100644
--- a/engine/client/vid_common.c
+++ b/engine/client/vid_common.c
@@ -93,7 +93,7 @@ VID_GetModeString
 const char *VID_GetModeString( int vid_mode )
 {
 	vidmode_t *vidmode;
-	if( vid_mode < 0 || vid_mode > R_MaxVideoModes() )
+	if( vid_mode < 0 || vid_mode >= R_MaxVideoModes() )
 		return NULL;
 
 	if( !( vidmode = R_GetVideoMode( vid_mode ) ) )
diff --git a/engine/common/mod_bmodel.c b/engine/common/mod_bmodel.c
index f23bb6ba..e7cb6590 100644
--- a/engine/common/mod_bmodel.c
+++ b/engine/common/mod_bmodel.c
@@ -2791,7 +2791,7 @@ static void Mod_LoadTexInfo( model_t *mod, dbspmodel_t *bmod )
 				out->vecs[j][k] = in->vecs[j][k];
 
 		miptex = in->miptex;
-		if( miptex < 0 || miptex > mod->numtextures )
+		if( miptex < 0 || miptex >= mod->numtextures )
 			miptex = 0; // this is possible?
 		out->texture = mod->textures[miptex];
 		out->flags = in->flags;