diff --git a/src/libpmem/pmem_posix.c b/src/libpmem/pmem_posix.c
index d295b13c732..d7dd2c5e264 100644
--- a/src/libpmem/pmem_posix.c
+++ b/src/libpmem/pmem_posix.c
@@ -2,7 +2,7 @@
 /* Copyright 2014-2019, Intel Corporation */
 
 /*
- * pmem_posix.c -- pmem utilities with Posix implementation
+ * pmem_posix.c -- pmem utilities with Posix implementation xD
  */
 
 #include <stddef.h>