diff --git a/src/lua_maplib.c b/src/lua_maplib.c
index 8ce6551f7..309ba86a1 100644
--- a/src/lua_maplib.c
+++ b/src/lua_maplib.c
@@ -157,15 +157,13 @@ static const char *const side_opt[] = {
 enum vertex_e {
 	vertex_valid = 0,
 	vertex_x,
-	vertex_y,
-	vertex_z
+	vertex_y
 };
 
 static const char *const vertex_opt[] = {
 	"valid",
 	"x",
 	"y",
-	"z",
 	NULL};
 
 enum ffloor_e {
@@ -970,9 +968,6 @@ static int vertex_get(lua_State *L)
 	case vertex_y:
 		lua_pushfixed(L, vertex->y);
 		return 1;
-	case vertex_z:
-		lua_pushfixed(L, vertex->z);
-		return 1;
 	}
 	return 0;
 }
diff --git a/src/p_setup.c b/src/p_setup.c
index bd1c53104..fa60fcf6d 100644
--- a/src/p_setup.c
+++ b/src/p_setup.c
@@ -846,7 +846,6 @@ static void P_LoadVertices(UINT8 *data)
 	{
 		v->x = SHORT(mv->x)<<FRACBITS;
 		v->y = SHORT(mv->y)<<FRACBITS;
-		v->z = 0;
 	}
 }
 
@@ -1575,7 +1574,6 @@ static void P_LoadTextmap(void)
 	{
 		// Defaults.
 		vt->x = vt->y = INT32_MAX;
-		vt->z = 0;
 
 		TextmapParse(vertexesPos[i], i, ParseTextmapVertexParameter);
 
diff --git a/src/r_defs.h b/src/r_defs.h
index 96ef953ce..c7c198d66 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -83,7 +83,7 @@ typedef struct extracolormap_s
   */
 typedef struct
 {
-	fixed_t x, y, z;
+	fixed_t x, y;
 } vertex_t;
 
 // Forward of linedefs, for sectors.