diff --git a/lib/ChangeLog b/lib/ChangeLog
index 10092d1..6ba1d6f 100644
--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,11 @@
+2004-11-24 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
+
+	* zassert.h: New header file to declare a quagga-specific assert macro.
+	* log.c: (_zlog_assert_failed) New function called when assert fails
+	  to log the error and abort.
+	* zebra.h: Include "zassert.h" instead of <assert.h>.
+	* regex.c: Include "zassert.h" instead of <assert.h>.
+
 2004-11-23 Andrew J. Schorr <ajschorr@alumni.princeton.edu>
 
 	* sigevent.c: (signal_init) Set up some default signal handlers
diff --git a/lib/log.c b/lib/log.c
index c55bfcb..38f8ece 100644
--- a/lib/log.c
+++ b/lib/log.c
@@ -315,6 +315,15 @@
 
 #undef PLOG_FUNC
 
+void
+_zlog_assert_failed (const char *assertion, const char *file,
+		     unsigned int line, const char *function)
+{
+  zlog_err("Assertion `%s' failed in file %s, line %u, function %s",
+	   assertion,file,line,(function ? function : "?"));
+  abort();
+}
+
 
 /* Open log stream */
 struct zlog *
diff --git a/lib/regex.c b/lib/regex.c
index 2eb7c11..2f90dde 100644
--- a/lib/regex.c
+++ b/lib/regex.c
@@ -613,7 +613,7 @@
 # include <stdio.h>
 
 /* It is useful to test things that ``must'' be true when debugging.  */
-# include <assert.h>
+# include "zassert.h"
 
 static int debug;
 
diff --git a/lib/zassert.h b/lib/zassert.h
new file mode 100644
index 0000000..77ebf5d
--- /dev/null
+++ b/lib/zassert.h
@@ -0,0 +1,23 @@
+#ifndef _QUAGGA_ASSERT_H
+#define _QUAGGA_ASSERT_H
+
+extern void _zlog_assert_failed (const char *assertion, const char *file,
+				 unsigned int line, const char *function)
+				 __attribute__ ((noreturn));
+
+#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
+#define __ASSERT_FUNCTION    __func__
+#elif defined(__GNUC__)
+#define __ASSERT_FUNCTION    __FUNCTION__
+#else
+#define __ASSERT_FUNCTION    NULL
+#endif
+
+#define zassert(EX) ((void)((EX) ?  0 :	\
+			    (_zlog_assert_failed(#EX, __FILE__, __LINE__, \
+						 __ASSERT_FUNCTION), 0)))
+
+#undef assert
+#define assert(EX) zassert(EX)
+
+#endif /* _QUAGGA_ASSERT_H */
diff --git a/lib/zebra.h b/lib/zebra.h
index f2c396d..5d0e238 100644
--- a/lib/zebra.h
+++ b/lib/zebra.h
@@ -95,7 +95,7 @@
 
 /* misc include group */
 #include <stdarg.h>
-#include <assert.h>
+#include "zassert.h"
 
 #ifdef HAVE_LCAPS
 #include <sys/capability.h>