* Friend declaration is no declaration 11.4/9.

diff --git a/ginac/power.h b/ginac/power.h
index 0f8cdf67dff0f4ee635924302deeb44858ca9da6..86ba6c91dbb94db8bd0c5fb93be0989e61fea5e7 100644 (file)
--- a/ginac/power.h
+++ b/ginac/power.h
@@ -30,6 +30,7 @@ namespace GiNaC {
 
 class numeric;
 class add;
+class mul;
 
 /** This class holds a two-component object, a basis and and exponent
  *  representing exponentiation. */