diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index da86e04f5d..b0bbf5b7b3 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+Fri Jul 12 17:59:47 1996  Fred Fish  <fnf@ninemoons.com>
+
+	* objfiles.c (map_to_file): Error return from mmalloc_findbase is
+	a NULL pointer, not a -1.
+
 Fri Jul 12 10:16:24 1996  Stu Grossman  (grossman@critters.cygnus.com)
 
 	* i386-tdep.c (set_assembly_language_command):  New routine to
diff --git a/gdb/objfiles.c b/gdb/objfiles.c
index 85f35cb819..ceea859a06 100644
--- a/gdb/objfiles.c
+++ b/gdb/objfiles.c
@@ -898,7 +898,7 @@ map_to_file (fd)
 	{
 	  /* This is a freshly created mapping file. */
 	  mapto = (CORE_ADDR) mmalloc_findbase (20 * 1024 * 1024);
-	  if (mapto != -1)
+	  if (mapto != NULL)
 	    {
 	      /* To avoid reusing the freshly created mapping file, at the 
 		 address selected by mmap, we must truncate it before trying