diff --git a/fuzzers/utils_fuzzer.c b/fuzzers/utils_fuzzer.c
index 73c3f4e1d4..4fafbd79f9 100644
--- a/fuzzers/utils_fuzzer.c
+++ b/fuzzers/utils_fuzzer.c
@@ -1,34 +1,34 @@
 /*
  * Copyright 2024 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 <stdint.h>
 #include <stdlib.h>
 #include <stdio.h>
 
 #include <crm/common/util.h>
-#include <crm/common/util_compat.h>
+#include <crm/common/internal.h>
 
 int
 LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
-  char *ns;
-  guint result;
+    char *ns = NULL;
+    guint result = 0U;
 
-  if (size < 10) {
-    return 0;
-  }
-  ns = malloc(size+1);
-  memcpy(ns, data, size);
-  ns[size] = '\0';
+    if (size < 10) {
+        return 0;
+    }
+    ns = pcmk__assert_alloc(1, size + 1);
+    memcpy(ns, data, size);
+    ns[size] = '\0';
 
-  pcmk_parse_interval_spec(ns, &result);
+    pcmk_parse_interval_spec(ns, &result);
 
-  free(ns);  
-  return 0;
+    free(ns);
+    return 0;
 }