diff --git a/src/ar65/error.h b/src/ar65/error.h
index 1f6823269..61d2a0394 100644
--- a/src/ar65/error.h
+++ b/src/ar65/error.h
@@ -43,19 +43,6 @@
 
 
 
-/*****************************************************************************/
-/*	  		   	     Data		     		     */
-/*****************************************************************************/
-
-
-
-/* Messages for internal compiler errors */
-extern const char _MsgCheckFailed [];
-extern const char _MsgPrecondition [];
-extern const char _MsgFail [];
-
-
-
 /*****************************************************************************/
 /*     	      	    		     Code				     */
 /*****************************************************************************/
@@ -71,17 +58,6 @@ void Error (const char* Format, ...) attribute((format(printf,1,2)));
 void Internal (const char* Format, ...) attribute((format(printf,1,2)));
 /* Print an internal error message and die */
 
-#define CHECK(c)     							\
-    if (!(c)) 	       	       	       	       	       	     		\
- 	Internal (_MsgCheckFailed, #c, c, __FILE__, __LINE__)
-
-#define PRECONDITION(c)							\
-    if (!(c)) 	       	       	       	       	       	     		\
-       	Internal (_MsgPrecondition, #c, c, __FILE__, __LINE__)
-
-#define FAIL(s)								\
-    Internal (_MsgFail, s, __FILE__, __LINE__)
-
 
 
 /* End of error.h */
diff --git a/src/ar65/objdata.c b/src/ar65/objdata.c
index c2d830f8e..5c979e8f5 100644
--- a/src/ar65/objdata.c
+++ b/src/ar65/objdata.c
@@ -35,8 +35,11 @@
 
 #include <string.h>
 
-#include "../common/xmalloc.h"
-
+/* common */
+#include "check.h"
+#include "xmalloc.h"
+		  
+/* ar65 */
 #include "error.h"
 #include "objdata.h"