diff --git a/nss/nss_module.c b/nss/nss_module.c
index 3cd1940b22..ac94e4d3f0 100644
--- a/nss/nss_module.c
+++ b/nss/nss_module.c
@@ -41,7 +41,7 @@
    pointer manipulation.  The "-1" accounts for the trailing NUL
    included in the sizeof.  */
 static const char *const __nss_shlib_revision
-	= LIBNSS_FILES_SO + sizeof("libnss_files.so") - 1;
+	= &LIBNSS_FILES_SO[sizeof("libnss_files.so") - 1];
 
 /* A single-linked list used to implement a mapping from service names
    to NSS modules.  (Most systems only use five or so modules, so a