diff --git a/client/shader/hex.vert b/client/shader/hex.vert
index 036886d..e8cfdd2 100644
--- a/client/shader/hex.vert
+++ b/client/shader/hex.vert
@@ -1,5 +1,6 @@
 #version 450
 #extension GL_EXT_buffer_reference : require
+#extension GL_EXT_buffer_reference_uvec2 : require
 
 #include "hex_common.glsl"
 
@@ -16,6 +17,10 @@ vec4 int2color(uint color_int) {
 void main() {
   int region_index = gl_InstanceIndex/region_hex_count;
   Region region = pc.context.regions[region_index];
+  if(uvec2(region) == uvec2(0)) {
+    gl_Position = vec4(0, 0, 0, 0);
+    return;
+  }
   if(region.map != pc.context.current_map) {
     gl_Position = vec4(0, 0, 0, 0);
     return;
diff --git a/client/src/hex.c b/client/src/hex.c
index fd1fa3d..72b9392 100644
--- a/client/src/hex.c
+++ b/client/src/hex.c
@@ -2,6 +2,7 @@
 #include "gpu.h"
 #include "vulkan/vulkan_core.h"
 #include <stdio.h>
+#include <string.h>
 
 VkResult create_ray_pipeline(
     RenderContext* gpu,
@@ -498,7 +499,7 @@ VkResult set_hex_region(int32_t q, int32_t r, int32_t y, uint32_t map, HexRegion
   uint32_t i = 0;
   for(; i < MAX_LOADED_REGIONS; i++) {
     if(hex->regions[i] == NULL) {
-      hex->regions[i] = malloc(sizeof(GPUHexRegion));
+      hex->regions[i] = malloc(sizeof(HexRegion));
       *region = hex->regions[i];
       break;
     }