diff --git a/libs/glad/glad/gl/types.d b/libs/glad/glad/gl/types.d
index 12c28f2..46b15f2 100644
--- a/libs/glad/glad/gl/types.d
+++ b/libs/glad/glad/gl/types.d
@@ -39,8 +39,8 @@ alias GLsync = __GLsync*;
 struct __cl_context; alias _cl_context = __cl_context*;
 struct __cl_event; alias _cl_event = __cl_event*;
 extern(System) {
-alias GLDEBUGPROC = void function(GLenum, GLenum, GLuint, GLenum, GLsizei, in GLchar*, GLvoid*);
+alias GLDEBUGPROC = void function(GLenum, GLenum, GLuint, GLenum, GLsizei, GLchar*, GLvoid*);
 alias GLDEBUGPROCARB = GLDEBUGPROC;
 alias GLDEBUGPROCKHR = GLDEBUGPROC;
-alias GLDEBUGPROCAMD = void function(GLuint, GLenum, GLenum, GLsizei, in GLchar*, GLvoid*);
+alias GLDEBUGPROCAMD = void function(GLuint, GLenum, GLenum, GLsizei, GLchar*, GLvoid*);
 }