diff --git a/lemon/random.h b/lemon/random.h
index 8de74ede8a..f9861f3916 100644
--- a/lemon/random.h
+++ b/lemon/random.h
@@ -249,8 +249,8 @@ namespace lemon {
 
         current = state + length;
 
-        register Word *curr = state + length - 1;
-        register long num;
+        Word *curr = state + length - 1;
+        long num;
 
         num = length - shift;
         while (num--) {