diff --git a/include/SDL_vulkan.h b/include/SDL_vulkan.h
index d69a436..5e4c4cf 100644
--- a/include/SDL_vulkan.h
+++ b/include/SDL_vulkan.h
@@ -205,9 +205,9 @@
  *  \sa SDL_Vulkan_CreateSurface()
  */
 extern DECLSPEC SDL_bool SDLCALL SDL_Vulkan_GetInstanceExtensions(
-														SDL_Window *window,
-														unsigned int *pCount,
-														const char **pNames);
+                                                        SDL_Window *window,
+                                                        unsigned int *pCount,
+                                                        const char **pNames);
 
 /**
  *  \brief Create a Vulkan rendering surface for a window.
@@ -239,9 +239,9 @@
  *  \sa SDL_Vulkan_GetInstanceExtensions()
  */
 extern DECLSPEC SDL_bool SDLCALL SDL_Vulkan_CreateSurface(
-												SDL_Window *window,
-												VkInstance instance,
-												VkSurfaceKHR* surface);
+                                                SDL_Window *window,
+                                                VkInstance instance,
+                                                VkSurfaceKHR* surface);
 
 /**
  *  \brief Get the size of a window's underlying drawable in pixels (for use