diff --git a/GL/texture.c b/GL/texture.c
index 8a6c701..55b283c 100644
--- a/GL/texture.c
+++ b/GL/texture.c
@@ -1651,3 +1651,11 @@ GLAPI GLvoid APIENTRY glDefragmentTextureMemory_KOS(void) {
 
     yalloc_defrag_commit(YALLOC_BASE);
 }
+
+GLAPI void APIENTRY glGetTexImage(GLenum tex, GLint lod, GLenum format, GLenum type, GLvoid* img) {
+    _GL_UNUSED(tex);
+    _GL_UNUSED(lod);
+    _GL_UNUSED(format);
+    _GL_UNUSED(type);
+    _GL_UNUSED(img);
+}
diff --git a/include/GL/gl.h b/include/GL/gl.h
index 8c194ba..1c19df6 100644
--- a/include/GL/gl.h
+++ b/include/GL/gl.h
@@ -684,6 +684,7 @@ GLAPI void APIENTRY glColorMask(GLboolean red, GLboolean green, GLboolean blue,
 GLAPI void APIENTRY glPixelStorei(GLenum pname, GLint param);
 GLAPI void APIENTRY glStencilFunc(GLenum func, GLint ref, GLuint mask);
 GLAPI void APIENTRY glStencilOp(GLenum sfail, GLenum dpfail, GLenum dppass);
+GLAPI void APIENTRY glGetTexImage(GLenum tex, GLint lod, GLenum format, GLenum type, GLvoid* img);
 
 __END_DECLS