diff --git a/src/common/header/common.h b/src/common/header/common.h
index c680a94..75ead88 100644
--- a/src/common/header/common.h
+++ b/src/common/header/common.h
@@ -715,9 +715,11 @@ YQ2_ATTR_NORETURN void Com_Quit(void);
  * format specifiers unter mingw. */
 #ifdef WIN32
 #define YQ2_COM_PRId64 "%I64d"
+#define YQ2_COM_PRIu64 "%I64u"
 #define YQ2_COM_PRIdS "%Id"
 #else
 #define YQ2_COM_PRId64 "%ld"
+#define YQ2_COM_PRIu64 "%llu"
 #define YQ2_COM_PRIdS "%zd"
 #endif
 
diff --git a/src/vk/vk_common.c b/src/vk/vk_common.c
index 57c6fa5..aae8e3b 100644
--- a/src/vk/vk_common.c
+++ b/src/vk/vk_common.c
@@ -2510,7 +2510,7 @@ uint8_t *QVk_GetStagingBuffer(VkDeviceSize size, int alignment, VkCommandBuffer
 	stagingBuffer = &vk_stagingBuffers[vk_activeStagingBuffer];
 	if (size > stagingBuffer->resource.size)
 	{
-		R_Printf(PRINT_ALL, "%s: %d: Resize stanging buffer" YQ2_COM_PRId64 "->" YQ2_COM_PRId64 "\n",
+		R_Printf(PRINT_ALL, "%s: %d: Resize stanging buffer" YQ2_COM_PRIu64 "->" YQ2_COM_PRIu64 "\n",
 			__func__, vk_activeStagingBuffer, stagingBuffer->resource.size, size);
 
 		DestroyStagingBuffer(stagingBuffer);