diff --git a/HTMLparser.c b/HTMLparser.c
index 9bd0fb34..9079fa8a 100644
--- a/HTMLparser.c
+++ b/HTMLparser.c
@@ -598,7 +598,8 @@ htmlSkipBlankChars(xmlParserCtxtPtr ctxt) {
 	    if (*ctxt->input->cur == 0)
 		xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
 	}
-	res++;
+	if (res < INT_MAX)
+	    res++;
     }
     return(res);
 }
diff --git a/parser.c b/parser.c
index 230872f4..1bea54eb 100644
--- a/parser.c
+++ b/parser.c
@@ -2202,7 +2202,8 @@ xmlSkipBlankChars(xmlParserCtxtPtr ctxt) {
 		ctxt->input->col++;
 	    }
 	    cur++;
-	    res++;
+	    if (res < INT_MAX)
+		res++;
 	    if (*cur == 0) {
 		ctxt->input->cur = cur;
 		xmlParserInputGrow(ctxt->input, INPUT_CHUNK);
@@ -2238,7 +2239,8 @@ xmlSkipBlankChars(xmlParserCtxtPtr ctxt) {
              * by the attachment of one leading and one following space (#x20)
              * character."
              */
-	    res++;
+	    if (res < INT_MAX)
+		res++;
         }
     }
     return(res);