diff --git a/lib/posix/fs.c b/lib/posix/fs.c
index 87efba07b50..5c621de7574 100644
--- a/lib/posix/fs.c
+++ b/lib/posix/fs.c
@@ -250,7 +250,7 @@ struct dirent *readdir(DIR *dirp)
 
 	rc = strlen(fdirent.name);
 	rc = (rc < PATH_MAX) ? rc : (PATH_MAX - 1);
-	memcpy(pdirent.d_name, fdirent.name, rc);
+	(void)memcpy(pdirent.d_name, fdirent.name, rc);
 
 	/* Make sure the name is NULL terminated */
 	pdirent.d_name[rc] = '\0';
diff --git a/lib/posix/pthread.c b/lib/posix/pthread.c
index 0eda809476a..a141babc8c4 100644
--- a/lib/posix/pthread.c
+++ b/lib/posix/pthread.c
@@ -283,7 +283,7 @@ int pthread_attr_init(pthread_attr_t *attr)
 		return ENOMEM;
 	}
 
-	memcpy(attr, &init_pthread_attrs, sizeof(pthread_attr_t));
+	(void)memcpy(attr, &init_pthread_attrs, sizeof(pthread_attr_t));
 
 	return 0;
 }