diff --git a/src/vulkan/runtime/vk_nir.c b/src/vulkan/runtime/vk_nir.c
index 4a349e44809..6578019ceca 100644
--- a/src/vulkan/runtime/vk_nir.c
+++ b/src/vulkan/runtime/vk_nir.c
@@ -31,7 +31,7 @@
 #define SPIR_V_MAGIC_NUMBER 0x07230203
 
 uint32_t
-vk_spirv_version(uint32_t *spirv_data, size_t spirv_size_B)
+vk_spirv_version(const uint32_t *spirv_data, size_t spirv_size_B)
 {
    assert(spirv_size_B >= 8);
    assert(spirv_data[0] == SPIR_V_MAGIC_NUMBER);
diff --git a/src/vulkan/runtime/vk_nir.h b/src/vulkan/runtime/vk_nir.h
index f6cfe5b8636..6015ba1e74c 100644
--- a/src/vulkan/runtime/vk_nir.h
+++ b/src/vulkan/runtime/vk_nir.h
@@ -34,7 +34,7 @@ struct vk_device;
 extern "C" {
 #endif
 
-uint32_t vk_spirv_version(uint32_t *spirv_data, size_t spirv_size_B);
+uint32_t vk_spirv_version(const uint32_t *spirv_data, size_t spirv_size_B);
 
 nir_shader *
 vk_spirv_to_nir(struct vk_device *device,