1 files changed, 1 insertions, 1 deletions

diff --git a/src/editfns.c b/src/editfns.c
index f1b77d56ff0..6599f23bae2 100644
--- a/src/editfns.c
+++ b/src/editfns.c
@@ -2579,7 +2579,7 @@ Use %% to put a single % into the output.")
             else
 #endif
               if (*format != 'd' && *format != 'o' && *format != 'x'
-                  && *format != 'X' && *format != 'c')
+                  && *format != 'i' && *format != 'X' && *format != 'c')
                 error ("Invalid format operation %%%c", *format);
 
             thissize = 30;