diff --git a/auto/src/glew_init_tail.c b/auto/src/glew_init_tail.c
index 8a1b045..90188bf 100644
--- a/auto/src/glew_init_tail.c
+++ b/auto/src/glew_init_tail.c
@@ -35,9 +35,9 @@ GLboolean glewExperimental = GL_FALSE;
 #if !defined(GLEW_MX)
 
 #if defined(_WIN32)
-extern GLenum wglewContextInit (void);
+extern GLenum GLEWAPIENTRY wglewContextInit (void);
 #elif !defined(__ANDROID__) && (!defined(__APPLE__) || defined(GLEW_APPLE_GLX))
-extern GLenum glxewContextInit (void);
+extern GLenum GLEWAPIENTRY glxewContextInit (void);
 #endif /* _WIN32 */
 
 GLenum GLEWAPIENTRY glewInit (void)