diff --git a/engine/gl/gl_vidmorphos.c b/engine/gl/gl_vidmorphos.c
index 5d9bf37ce..3757f2fc4 100644
--- a/engine/gl/gl_vidmorphos.c
+++ b/engine/gl/gl_vidmorphos.c
@@ -91,6 +91,9 @@ static void *TinyGL_GetSymbol(char *name)
 	else if (strcmp(name, "glCopyTexImage2D") == 0)
 		ret = stub_glCopyTexImage2D;
 
+	else if (strcmp(name, "glCopyTexSubImage2D") == 0)
+		ret = stub_glCopyTexSubImage2D;
+
 	else if (strcmp(name, "glCullFace") == 0)
 		ret = stub_glCullFace;
 
diff --git a/engine/gl/gl_vidtinyglstubs.c b/engine/gl/gl_vidtinyglstubs.c
index 609732c46..7e75a687f 100644
--- a/engine/gl/gl_vidtinyglstubs.c
+++ b/engine/gl/gl_vidtinyglstubs.c
@@ -94,6 +94,14 @@ void stub_glCopyTexImage2D(GLenum target, GLint level, GLenum internalFormat, GL
 #endif
 }
 
+void stub_glCopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height)
+{
+#warning Not implemented
+#if 0
+	glCopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
+#endif
+}
+
 void stub_glCullFace(GLenum mode)
 {
 	glCullFace(mode);