diff --git a/library/ssl_cli.c b/library/ssl_cli.c
index 88864b813..738014e9e 100644
--- a/library/ssl_cli.c
+++ b/library/ssl_cli.c
@@ -938,7 +938,7 @@ static int ssl_write_client_hello( mbedtls_ssl_context *ssl )
 #endif
 
     /*
-     * We don't support compression with DTLS right now: is many records come
+     * We don't support compression with DTLS right now: if many records come
      * in the same datagram, uncompressing one could overwrite the next one.
      * We don't want to add complexity for handling that case unless there is
      * an actual need for it.