diff --git a/sc2/src/libs/uio/debug.h b/sc2/src/libs/uio/debug.h
index 03999a30f..fd6a3ffe6 100644
--- a/sc2/src/libs/uio/debug.h
+++ b/sc2/src/libs/uio/debug.h
@@ -18,8 +18,8 @@
  *
  */
 
-#ifndef _DEBUG_H
-#define _DEBUG_H
+#ifndef UIO_DEBUG_H
+#define UIO_DEBUG_H
 
 void uio_debugInteractive(FILE *in, FILE *out, FILE *err);
 
diff --git a/sc2/src/uqm/uqmdebug.h b/sc2/src/uqm/uqmdebug.h
index d1996c7d6..bee8562c3 100644
--- a/sc2/src/uqm/uqmdebug.h
+++ b/sc2/src/uqm/uqmdebug.h
@@ -14,8 +14,8 @@
  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */
 
-#if !defined(_DEBUG_H) && (defined(DEBUG) || defined(USE_DEBUG_KEY))
-#define _DEBUG_H
+#if !defined(UQMDEBUG_H) && (defined(DEBUG) || defined(USE_DEBUG_KEY))
+#define UQMDEBUG_H
 
 #include "clock.h"
 #include "planets/planets.h"