diff --git a/src/gfx_apis/vulkan/shaders/fill.common.glsl b/src/gfx_apis/vulkan/shaders/fill.common.glsl
index 70ca4554..0a5d0d7d 100644
--- a/src/gfx_apis/vulkan/shaders/fill.common.glsl
+++ b/src/gfx_apis/vulkan/shaders/fill.common.glsl
@@ -1,6 +1,6 @@
 #extension GL_EXT_buffer_reference : require
 
-layout(buffer_reference, buffer_reference_align = 8, std430) buffer Vertices {
+layout(buffer_reference, buffer_reference_align = 8, std430) readonly buffer Vertices {
 	vec2 pos[][4];
 };
 
diff --git a/src/gfx_apis/vulkan/shaders/out.common.glsl b/src/gfx_apis/vulkan/shaders/out.common.glsl
index 4f709e30..ff12d86f 100644
--- a/src/gfx_apis/vulkan/shaders/out.common.glsl
+++ b/src/gfx_apis/vulkan/shaders/out.common.glsl
@@ -1,6 +1,6 @@
 #extension GL_EXT_buffer_reference : require
 
-layout(buffer_reference, buffer_reference_align = 8, std430) buffer Vertices {
+layout(buffer_reference, buffer_reference_align = 8, std430) readonly buffer Vertices {
 	vec2 pos[][4];
 };
 
diff --git a/src/gfx_apis/vulkan/shaders/tex.common.glsl b/src/gfx_apis/vulkan/shaders/tex.common.glsl
index 9f501e27..8576231b 100644
--- a/src/gfx_apis/vulkan/shaders/tex.common.glsl
+++ b/src/gfx_apis/vulkan/shaders/tex.common.glsl
@@ -5,7 +5,7 @@ struct Vertex {
 	vec2 tex_pos[4];
 };
 
-layout(buffer_reference, buffer_reference_align = 8, std430) buffer Vertices {
+layout(buffer_reference, buffer_reference_align = 8, std430) readonly buffer Vertices {
 	Vertex vertices[];
 };