diff --git a/src/libstrongswan/utils/leak_detective.c b/src/libstrongswan/utils/leak_detective.c
index ea801bdff..680c3085b 100644
--- a/src/libstrongswan/utils/leak_detective.c
+++ b/src/libstrongswan/utils/leak_detective.c
@@ -215,6 +215,8 @@ char *whitelist[] = {
 	"gcry_check_version",
 	"gcry_randomize",
 	"gcry_create_nonce",
+	/* NSPR */
+	"PR_CallOnce",
 };
 
 /**