diff --git a/relaxng.c b/relaxng.c
index 0122d571..d124d72f 100644
--- a/relaxng.c
+++ b/relaxng.c
@@ -5366,7 +5366,7 @@ xmlRelaxNGParseNameClass(xmlRelaxNGParserCtxtPtr ctxt, xmlNodePtr node,
     } else {
         xmlRngPErr(ctxt, node, XML_RNGP_CHOICE_CONTENT,
                    "expecting name, anyName, nsName or choice : got %s\n",
-                   (node == NULL ? 'nothing' : node->name), NULL);
+                   (node == NULL ? "nothing" : node->name), NULL);
         return (NULL);
     }
     if (ret != def) {
@@ -9450,7 +9450,7 @@ xmlRelaxNGValidateInterleave(xmlRelaxNGValidCtxtPtr ctxt,
             ctxt->states = NULL;
             if (found == 0) {
                 if (cur == NULL) {
-                    VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA, 'noname');
+                    VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA, "noname");
                 } else {
                     VALID_ERR2(XML_RELAXNG_ERR_INTEREXTRA, cur->name);
                 }