diff --git a/man3/putenv.3 b/man3/putenv.3
index 7a26c476e..c358cc53d 100644
--- a/man3/putenv.3
+++ b/man3/putenv.3
@@ -117,7 +117,7 @@ the pointer \fIstring\fP given to
 is used.
 In particular, this string becomes part of the environment;
 changing it later will change the environment.
-(Thus, it is an error is to call
+(Thus, it is an error to call
 .BR putenv ()
 with an automatic variable
 as the argument, then return from the calling function while \fIstring\fP