diff --git a/data-extra.cabal b/data-extra.cabal
--- a/data-extra.cabal
+++ b/data-extra.cabal
@@ -1,5 +1,5 @@
 name:                data-extra
-version:             2.5.2
+version:             2.5.3
 synopsis:            Extra utilities for working on Data.* types.
 description:         Extra utilities for working on Data.* types.
 license:             BSD3
diff --git a/src/Data/Time/Extra.hs b/src/Data/Time/Extra.hs
--- a/src/Data/Time/Extra.hs
+++ b/src/Data/Time/Extra.hs
@@ -40,7 +40,7 @@
   span' = t1 `diffUTCTime` t2
   ranges = [(0,"%d seconds",1)
            ,(minute,"a minute",0)
-           ,(minute*2,"% minutes",minute)
+           ,(minute*2,"%d minutes",minute)
            ,(minute*30,"half an hour",0)
            ,(minute*31,"%d minutes",minute)
            ,(hour,"an hour",0)