diff --git a/src/igl/vulkan/VulkanContext.cpp b/src/igl/vulkan/VulkanContext.cpp
index 0defe94f00..cf8dd2455b 100644
--- a/src/igl/vulkan/VulkanContext.cpp
+++ b/src/igl/vulkan/VulkanContext.cpp
@@ -18,7 +18,8 @@
 
 // For volk.h, define this before including volk.h in exactly one CPP file.
 // @fb-only
-#if defined(IGL_CMAKE_BUILD)
+#if defined(IGL_CMAKE_BUILD) || defined(VOLK_HEADER_ONLY)
+#define VOLK_DEFAULT_VISIBILITY
 #define VOLK_IMPLEMENTATION
 #endif // IGL_CMAKE_BUILD
 
diff --git a/src/igl/vulkan/VulkanHelpers.c b/src/igl/vulkan/VulkanHelpers.c
index c8305c9291..82eaa7b9ac 100644
--- a/src/igl/vulkan/VulkanHelpers.c
+++ b/src/igl/vulkan/VulkanHelpers.c
@@ -10,10 +10,6 @@
 #include <windows.h>
 #endif
 
-#if defined(VOLK_HEADER_ONLY)
-#define VOLK_IMPLEMENTATION
-#endif
-
 #include "VulkanHelpers.h"
 
 #include <assert.h>