diff --git a/sys/sys/resource.h b/sys/sys/resource.h
index 7d0b4ee..b89d603 100644
--- a/sys/sys/resource.h
+++ b/sys/sys/resource.h
@@ -96,7 +96,11 @@ struct rusage {
 #define	RLIMIT_AS	RLIMIT_VMEM	/* standard name for RLIMIT_VMEM */
 #define	RLIMIT_NPTS	11		/* pseudo-terminals */
 #define	RLIMIT_SWAP	12		/* swap used */
-
+					/*
+					 * When adding a new resource limit
+					 * don't forget to add its string
+					 * identifier to rlimit_ident below.
+					 */
 #define	RLIM_NLIMITS	13		/* number of resource limits */
 
 #define	RLIM_INFINITY	((rlim_t)(((uint64_t)1 << 63) - 1))
@@ -108,7 +112,7 @@ struct rusage {
  */
 
 #ifdef _RLIMIT_IDENT
-static char *rlimit_ident[RLIM_NLIMITS] = {
+static const char *rlimit_ident[RLIM_NLIMITS] = {
 	"cpu",
 	"fsize",
 	"data",