diff --git a/security/manager/locales/en-US/chrome/pippki/pippki.properties b/security/manager/locales/en-US/chrome/pippki/pippki.properties
index 868e9ff30d13..9eafccd68d65 100644
--- a/security/manager/locales/en-US/chrome/pippki/pippki.properties
+++ b/security/manager/locales/en-US/chrome/pippki/pippki.properties
@@ -202,7 +202,7 @@ writeFileUnknownError=Unknown error
 
 #Add Security Exception dialog
 addExceptionBrandedWarning2=You are about to override how %S identifies this site.
-addExceptionInvalidHeader=This site attempts to identity itself with invalid information.
+addExceptionInvalidHeader=This site attempts to identify itself with invalid information.
 addExceptionDomainMismatchShort=Wrong Site
 addExceptionDomainMismatchLong=Certificate belongs to a different site, which could indicate an identity theft.
 addExceptionExpiredShort=Outdated Information