diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f7f3240e7b..6f4aa224a0 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+Mon Apr 20 15:32:21 1998   Mark Kettenis  <kettenis@phys.uva.nl>
+
+        * gdb/gdb_string.h (strdup): Declare only if not defined as a
+        macro.
+
 Mon Apr 20 14:18:45 1998  J. Kean Johnston  <jkj@sco.com>
 
         * procfs.c: Added replacement macros for LWP stuff.  Fixed support 
diff --git a/gdb/gdb_string.h b/gdb/gdb_string.h
index 0c6b68af03..6b8fb820f3 100644
--- a/gdb/gdb_string.h
+++ b/gdb/gdb_string.h
@@ -59,6 +59,8 @@ extern int   memcmp();
 # endif
 #endif
 
-extern char *strdup ();
+#ifndef strdup
+extern char *strdup PARAMS ((const char *));
+#endif
 
 #endif	/* !defined(GDB_STRING_H) */