diff --git a/plugins/in_calyptia_fleet/in_calyptia_fleet.c b/plugins/in_calyptia_fleet/in_calyptia_fleet.c
index ee1abb62d56..87c692aea1e 100644
--- a/plugins/in_calyptia_fleet/in_calyptia_fleet.c
+++ b/plugins/in_calyptia_fleet/in_calyptia_fleet.c
@@ -276,6 +276,10 @@ static int is_old_fleet_config(struct flb_in_calyptia_fleet_config *ctx, struct
     }
 
     cfgcurname = old_fleet_config_filename(ctx);
+    if (cfgcurname == NULL) {
+        flb_plg_error(ctx->ins, "unable to allocate configuration name");
+        return FLB_FALSE;
+    }
 
     if (strcmp(cfgcurname, cfg->conf_path_file) == 0) {
         ret = FLB_TRUE;