diff --git a/lib/common/scores.c b/lib/common/scores.c
index c5d3e80b6b..05bc31b6b4 100644
--- a/lib/common/scores.c
+++ b/lib/common/scores.c
@@ -1,98 +1,110 @@
 /*
  * Copyright 2004-2022 the Pacemaker project contributors
  *
  * The version control history for this file may have further details.
  *
  * This source code is licensed under the GNU Lesser General Public License
  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
  */
 
 #include <crm_internal.h>
 
 #ifndef _GNU_SOURCE
 #  define _GNU_SOURCE
 #endif
 
 #include <stdio.h>      // snprintf(), NULL
-#include <string.h>     // strncpy(), strdup()
+#include <string.h>     // strcpy(), strdup()
 #include <sys/types.h>  // size_t
 
 int pcmk__score_red = 0;
 int pcmk__score_green = 0;
 int pcmk__score_yellow = 0;
 
 /*!
  * \brief Get the integer value of a score string
  *
  * Given a string representation of a score, return the integer equivalent.
  * This accepts infinity strings as well as red, yellow, and green, and
  * bounds the result to +/-INFINITY.
  *
  * \param[in] score  Score as string
  *
  * \return Integer value corresponding to \p score
  */
 int
 char2score(const char *score)
 {
     if (score == NULL) {
         return 0;
 
     } else if (pcmk_str_is_minus_infinity(score)) {
         return -CRM_SCORE_INFINITY;
 
     } else if (pcmk_str_is_infinity(score)) {
         return CRM_SCORE_INFINITY;
 
     } else if (pcmk__str_eq(score, "red", pcmk__str_casei)) {
         return pcmk__score_red;
 
     } else if (pcmk__str_eq(score, "yellow", pcmk__str_casei)) {
         return pcmk__score_yellow;
 
     } else if (pcmk__str_eq(score, "green", pcmk__str_casei)) {
         return pcmk__score_green;
 
     } else {
         long long score_ll;
 
         pcmk__scan_ll(score, &score_ll, 0LL);
         if (score_ll > CRM_SCORE_INFINITY) {
             return CRM_SCORE_INFINITY;
 
         } else if (score_ll < -CRM_SCORE_INFINITY) {
             return -CRM_SCORE_INFINITY;
 
         } else {
             return (int) score_ll;
         }
     }
 }
 
+/*!
+ * \brief Convert an integer score to a string, using a provided buffer
+ *
+ * Store the string equivalent of a given integer score in a given string
+ * buffer, using "INFINITY" and "-INFINITY" when appropriate.
+ *
+ * \param[in]  score  Integer score to convert
+ * \param[out] buf    Where to store string representation of \p score
+ * \param[in]  len    Size of \p buf (in bytes)
+ *
+ * \return \p buf (or NULL if \p len is too small)
+ */
 char *
 score2char_stack(int score, char *buf, size_t len)
 {
     CRM_CHECK((buf != NULL) && (len >= sizeof(CRM_MINUS_INFINITY_S)),
               return NULL);
 
     if (score >= CRM_SCORE_INFINITY) {
-        strncpy(buf, CRM_INFINITY_S, 9);
+        strcpy(buf, CRM_INFINITY_S);
     } else if (score <= -CRM_SCORE_INFINITY) {
-        strncpy(buf, CRM_MINUS_INFINITY_S , 10);
+        strcpy(buf, CRM_MINUS_INFINITY_S);
     } else {
         snprintf(buf, len, "%d", score);
     }
     return buf;
 }
 
 char *
 score2char(int score)
 {
     if (score >= CRM_SCORE_INFINITY) {
         return strdup(CRM_INFINITY_S);
 
     } else if (score <= -CRM_SCORE_INFINITY) {
         return strdup(CRM_MINUS_INFINITY_S);
     }
     return pcmk__itoa(score);
 }