diff --git a/GL.hpp b/GL.hpp
index e55f47b..c4f75eb 100644
--- a/GL.hpp
+++ b/GL.hpp
@@ -267,7 +267,7 @@ GLAPI void APIENTRY glClearStencil (GLint s);
 GLAPI void APIENTRY glClearDepth (GLdouble depth);
 GLAPI void APIENTRY glStencilMask (GLuint mask);
 GLAPI void APIENTRY glColorMask (GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha);
-GLAPI void APIENTRY glDepthMask (GLboolean flag);
+GLAPI void (APIENTRY glDepthMask) (GLboolean flag);
 GLAPI void APIENTRY glDisable (GLenum cap);
 GLAPI void APIENTRY glEnable (GLenum cap);
 GLAPI void APIENTRY glFinish (void);
@@ -690,7 +690,7 @@ GLAPI void APIENTRYFP glValidateProgram (GLuint program);
 GLAPI void APIENTRYFP glVertexAttrib1d (GLuint index, GLdouble x);
 GLAPI void APIENTRYFP glVertexAttrib1dv (GLuint index, const GLdouble *v);
 GLAPI void APIENTRYFP glVertexAttrib1f (GLuint index, GLfloat x);
-GLAPI void APIENTRYFP glVertexAttrib1fv (GLuint index, const GLfloat *v);
+GLAPI void (APIENTRYFP glVertexAttrib1fv) (GLuint index, const GLfloat *v);
 GLAPI void APIENTRYFP glVertexAttrib1s (GLuint index, GLshort x);
 GLAPI void APIENTRYFP glVertexAttrib1sv (GLuint index, const GLshort *v);
 GLAPI void APIENTRYFP glVertexAttrib2d (GLuint index, GLdouble x, GLdouble y);