diff --git a/include/SDL_vulkan.h b/include/SDL_vulkan.h
index 6c7d305f2..803b5feef 100644
--- a/include/SDL_vulkan.h
+++ b/include/SDL_vulkan.h
@@ -150,7 +150,7 @@ extern DECLSPEC void SDLCALL SDL_Vulkan_UnloadLibrary(void);
  *  \note \c window should have been created with the \c SDL_WINDOW_VULKAN flag.
  *
  *  \code
- *  unsigned count;
+ *  unsigned int count;
  *  // get count of required extensions
  *  if(!SDL_Vulkan_GetInstanceExtensions(window, &count, NULL))
  *      handle_error();
@@ -188,7 +188,7 @@ extern DECLSPEC void SDLCALL SDL_Vulkan_UnloadLibrary(void);
  */
 extern DECLSPEC SDL_bool SDLCALL SDL_Vulkan_GetInstanceExtensions(
 														SDL_Window *window,
-														unsigned *pCount,
+														unsigned int *pCount,
 														const char **pNames);
 
 /**
diff --git a/src/dynapi/SDL_dynapi_procs.h b/src/dynapi/SDL_dynapi_procs.h
index 7e6e547ea..b7466fdb6 100644
--- a/src/dynapi/SDL_dynapi_procs.h
+++ b/src/dynapi/SDL_dynapi_procs.h
@@ -666,6 +666,6 @@ SDL_DYNAPI_PROC(SDL_Surface*,SDL_DuplicateSurface,(SDL_Surface *a),(a),return)
 SDL_DYNAPI_PROC(int,SDL_Vulkan_LoadLibrary,(const char *a),(a),return)
 SDL_DYNAPI_PROC(void*,SDL_Vulkan_GetVkGetInstanceProcAddr,(void),(),return)
 SDL_DYNAPI_PROC(void,SDL_Vulkan_UnloadLibrary,(void),(),)
-SDL_DYNAPI_PROC(SDL_bool,SDL_Vulkan_GetInstanceExtensions,(SDL_Window *a, unsigned *b, const char **c),(a,b,c),return)
+SDL_DYNAPI_PROC(SDL_bool,SDL_Vulkan_GetInstanceExtensions,(SDL_Window *a, unsigned int *b, const char **c),(a,b,c),return)
 SDL_DYNAPI_PROC(SDL_bool,SDL_Vulkan_CreateSurface,(SDL_Window *a, VkInstance b, VkSurfaceKHR *c),(a,b,c),return)
 SDL_DYNAPI_PROC(void,SDL_Vulkan_GetDrawableSize,(SDL_Window *a, int *b, int *c),(a,b,c),)