diff --git a/ChangeLog b/ChangeLog
index 5dac6b29..103d4921 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Mar 12 19:19:04 CET 2001 Daniel Veillard <Daniel.Veillard@imag.fr>
+
+	* xpath.c: ptittom found a small bug in UnaryExpr
+
 Sat Mar 10 13:09:53 CET 2001 Daniel Veillard <Daniel.Veillard@imag.fr>
 
 	* configure.in: bumped to 2.3.4
diff --git a/xpath.c b/xpath.c
index bab3c41c..9026bbb7 100644
--- a/xpath.c
+++ b/xpath.c
@@ -5630,8 +5630,8 @@ xmlXPathEvalUnaryExpr(xmlXPathParserContextPtr ctxt) {
     int minus = 0;
 
     SKIP_BLANKS;
-    if (CUR == '-') {
-        minus = 1;
+    while (CUR == '-') {
+        minus = 1 - minus;
 	NEXT;
 	SKIP_BLANKS;
     }