diff --git a/fdbcli/TenantCommands.actor.cpp b/fdbcli/TenantCommands.actor.cpp
index e4e189213a..334064fb48 100644
--- a/fdbcli/TenantCommands.actor.cpp
+++ b/fdbcli/TenantCommands.actor.cpp
@@ -293,7 +293,7 @@ ACTOR Future<bool> tenantDeleteIdCommand(Reference<IDatabase> db, std::vector<St
 				fmt::print(stderr, "ERROR: delete by ID should only be run on a management cluster.\n");
 				return false;
 			}
-			if (sscanf(tokens[2].toString().c_str(), "%ld%n", &tenantId, &n) != 1 || n != tokens[2].size() ||
+			if (sscanf(tokens[2].toString().c_str(), "%" PRId64 "%n", &tenantId, &n) != 1 || n != tokens[2].size() ||
 			    tenantId < 0) {
 				fmt::print(stderr, "ERROR: invalid ID `{}'\n", tokens[2].toString().c_str());
 				return false;