diff --git a/HTMLtree.c b/HTMLtree.c
index d8c5dc6..2d3b8a4 100644
--- a/HTMLtree.c
+++ b/HTMLtree.c
@@ -181,12 +181,13 @@
 	return(-1);
 
     if (encoding != NULL) {
-#ifndef HAVE_SNPRINTF
+#ifdef HAVE_SNPRINTF
+	snprintf(newcontent, sizeof(newcontent), "text/html; charset=%s",
+                encoding);
+#else
 	sprintf(newcontent, "text/html; charset=%s", encoding);
-#else /* HAVE_SNPRINTF */
-	snprintf(newcontent, 99, "text/html; charset=%s", encoding);
-#endif /* HAVE_SNPRINTF */
-	newcontent[99] = 0;
+#endif
+	newcontent[sizeof(newcontent) - 1] = 0;
     }
 
     cur = doc->children;