diff --git a/sexp2dsa.c b/sexp2dsa.c
index cb76853fcdc978020adff014c1b93901ccd0229a..c947546f963587d3e8f1728a80effc5c74620a65 100644
--- a/sexp2dsa.c
+++ b/sexp2dsa.c
@@ -54,7 +54,7 @@ dsa_keypair_from_sexp_alist(struct dsa_public_key *pub,
 			    unsigned limit,
 			    struct sexp_iterator *i)
 {
-  static const uint8_t *names[5]
+  static const uint8_t * const names[5]
     = { "p", "q", "g", "y", "x" };
   struct sexp_iterator values[5];
   unsigned nvalues = priv ? 5 : 4;
@@ -91,7 +91,7 @@ int
 dsa_signature_from_sexp(struct dsa_signature *rs,
 			struct sexp_iterator *i)
 {
-  static const uint8_t *names[2] = { "r", "s" };
+  static const uint8_t * const names[2] = { "r", "s" };
   struct sexp_iterator values[2];
 
   if (!sexp_iterator_assoc(i, 2, names, values))
diff --git a/sexp2rsa.c b/sexp2rsa.c
index 48fe3abef46f45d62f2a17822bf28ff519ef278a..9416ba985f19c55f687f8e78a178bf713b33dfe7 100644
--- a/sexp2rsa.c
+++ b/sexp2rsa.c
@@ -54,7 +54,7 @@ rsa_keypair_from_sexp_alist(struct rsa_public_key *pub,
 			    unsigned limit,
 			    struct sexp_iterator *i)
 {
-  static const uint8_t *names[8]
+  static const uint8_t * const names[8]
     = { "n", "e", "d", "p", "q", "a", "b", "c" };
   struct sexp_iterator values[8];
   unsigned nvalues = priv ? 8 : 2;
@@ -94,7 +94,7 @@ rsa_keypair_from_sexp(struct rsa_public_key *pub,
 		      unsigned length, const uint8_t *expr)
 {
   struct sexp_iterator i;
-  static const uint8_t *names[3]
+  static const uint8_t * const names[3]
     = { "rsa", "rsa-pkcs1", "rsa-pkcs1-sha1" };
 
   if (!sexp_iterator_first(&i, length, expr))