diff --git a/src/files/surf.c b/src/files/surf.c
index e3dd05b..cb0df1f 100644
--- a/src/files/surf.c
+++ b/src/files/surf.c
@@ -174,6 +174,9 @@ R_SetFrustum(vec3_t vup, vec3_t vpn, vec3_t vright, vec3_t r_origin,
 	RotatePointAroundVector(frustum[3].normal, vright, vpn,
 			-(90 - fov_y / 2));
 
+#if defined(__GNUC__)
+#       pragma GCC unroll 4
+#endif
 	for (i = 0; i < 4; i++)
 	{
 		frustum[i].type = PLANE_ANYZ;
diff --git a/src/vk/vk_model.c b/src/vk/vk_model.c
index 85ca403..f77be30 100644
--- a/src/vk/vk_model.c
+++ b/src/vk/vk_model.c
@@ -85,8 +85,7 @@ Mod_Reallocate (void)
 
 	R_Printf(PRINT_ALL, "Reallocate space for %d models.\n", models_known_max);
 
-	models_known = malloc(models_known_max * sizeof(model_t));
-	memset(models_known, 0, models_known_max * sizeof(model_t));
+	models_known = calloc(models_known_max, sizeof(model_t));
 }
 
 /*