diff --git a/lib/pure/mersenne.nim b/lib/pure/mersenne.nim
index 6ec0d66b40..37c5085b1d 100644
--- a/lib/pure/mersenne.nim
+++ b/lib/pure/mersenne.nim
@@ -8,7 +8,7 @@
 ## random number generator.
 ## .. note:: The procs in this module work at compile-time.
 
-{.deprecated: "use `std/random` instead.".}
+{.deprecated: "use `std/random` instead".}
 
 runnableExamples:
   var rand = newMersenneTwister(uint32.high)  ## must be "var"