--- a/modes/glx/text3d2.cc
+++ b/modes/glx/text3d2.cc
@@ -83,7 +83,10 @@
 #endif
 #endif
 
+extern "C"
+{
 #include "rotator.h"
+}
 #include "text3d2.h"
 #include <GL/glu.h>