diff --git a/src/secret.c b/src/secret.c
index f34e05c..c284dcd 100644
--- a/src/secret.c
+++ b/src/secret.c
@@ -202,7 +202,7 @@ gfsec_secret_add_share(gfsec_secret_t *secret, gfsec_share_t *share)
                 return GFSEC_ERR_TOO_MANY_SHARES;
         }
 
-        tmp = realloc(secret->shares, new_max);
+        tmp = realloc(secret->shares, new_max * sizeof(gfsec_share_t *));
         if ( ! tmp )
             return GFSEC_ERR_SYSTEM_ERROR;