diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1917ff9b324..0e8820eb7ff 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2013-05-06  Doug Evans  <dje@google.com>
+
+	* psympriv.h (struct partial_symtab): Augment comment for member
+	section_offsets.
+
 2013-05-06  Joel Brobecker  <brobecker@adacore.com>
 
 	Reimplement shared library support on ppc-aix...
diff --git a/gdb/psympriv.h b/gdb/psympriv.h
index 50e5822d433..7a62bccbb91 100644
--- a/gdb/psympriv.h
+++ b/gdb/psympriv.h
@@ -98,7 +98,9 @@ struct partial_symtab
 
   const char *dirname;
 
-  /* Set of relocation offsets to apply to each section.  */
+  /* Set of relocation offsets to apply to each section.
+     This is typically objfile->section_offsets, but in some cases
+     it's different.  See, e.g., elfstab_offset_sections.  */
 
   struct section_offsets *section_offsets;