diff --git a/doc/help_lang.php b/doc/help_lang.php
index 24dccfef7d..49427cf164 100644
--- a/doc/help_lang.php
+++ b/doc/help_lang.php
@@ -111,7 +111,7 @@ function show_vols($vols) {
         email list.
         <p>
         <span class=note>Note: BOINC helpers are unpaid volunteers.
-        Their advise is not endorsed by BOINC
+        Their advice is not endorsed by BOINC
         or the University of California.</span>
         <p>
         <span class=note>Note: <font color=red>Never</font> give out 
diff --git a/doc/help_vol.php b/doc/help_vol.php
index 259aa30f6e..295b7085f0 100644
--- a/doc/help_vol.php
+++ b/doc/help_vol.php
@@ -59,7 +59,7 @@ function live_contact($vol) {
     echo "
     <p>
     <span class=note>Note: BOINC helpers are unpaid volunteers.
-    Their advise is not endorsed by BOINC
+    Their advice is not endorsed by BOINC
     or the University of California.</span>
     <p>
     <span class=note>Note: <font color=red>Never</font> give out