diff --git a/core/json.c b/core/json.c
index a493fafc..a30e18f6 100644
--- a/core/json.c
+++ b/core/json.c
@@ -106,6 +106,8 @@ void uwsgi_json_config(char *file, char *magic_table[]) {
 		config_iter = json_object_iter_next(config, config_iter);
 	}
 
+	if (colon) colon[0] = ':';
+
 }
 
 #endif
diff --git a/core/xmlconf.c b/core/xmlconf.c
index 9a42d975..d6fbc3cf 100644
--- a/core/xmlconf.c
+++ b/core/xmlconf.c
@@ -151,6 +151,8 @@ void uwsgi_xml_config(char *filename, struct wsgi_request *wsgi_req, char *magic
 	}
 	/* We can safely free resources */
 
+	if (colon) colon[0] = ':';
+
 	xmlFreeDoc(doc);
 	xmlCleanupParser();
 
@@ -267,6 +269,7 @@ void uwsgi_xml_config(char *filename, struct wsgi_request *wsgi_req, char *magic
 
 	} while (!done);
 
+	if (colon) colon[0] = ':';
 
 	// we can safely free, as we have a copy of datas
 	XML_ParserFree(parser);
diff --git a/core/yaml.c b/core/yaml.c
index bd1dcba4..5dd43a4c 100644
--- a/core/yaml.c
+++ b/core/yaml.c
@@ -280,6 +280,7 @@ next:
 	}
 #endif
 
+	if (colon) colon[0] = ':';
 
 }