diff --git a/src/config_format/flb_cf_yaml.c b/src/config_format/flb_cf_yaml.c
index e3c84873230..04943da2caf 100644
--- a/src/config_format/flb_cf_yaml.c
+++ b/src/config_format/flb_cf_yaml.c
@@ -1934,10 +1934,16 @@ static int read_config(struct flb_cf *conf, struct local_ctx *ctx,
             return -1;
         }
 
-        if (flb_sds_printf(&include_dir, "%s/%s", parent->path, cfg_file) == NULL) {
+#ifdef _WIN32
+#define PATH_CONCAT_TEMPLATE "%s\\%s"
+#else
+#define PATH_CONCAT_TEMPLATE "%s/%s"
+#endif
+        if (flb_sds_printf(&include_dir, PATH_CONCAT_TEMPLATE, parent->path, cfg_file) == NULL) {
             flb_error("unable to create full filename");
             return -1;
         }
+#undef PATH_CONCAT_TEMPLATE
 
     }
     else {