diff --git a/src/AutGroup.jl b/src/AutGroup.jl
index cb4fa36..479514e 100644
--- a/src/AutGroup.jl
+++ b/src/AutGroup.jl
@@ -223,14 +223,14 @@ end
 #
 ###############################################################################
 
-const HASHINGCONST = 0x314a5215305f3ec1 # more or less random
+const HASHINGCONST = 0x7d28276b01874b19 # hash(Automorphism)
 
 hash(s::AutSymbol, h::UInt) = hash(s.str, hash(s.pow, hash(:AutSymbol, h)))
 
 function hash(g::Automorphism, h::UInt)
     if g.modified
-        g.savedhash = hash(reduce!.(g(domain(parent(g)))),
-            hash(typeof(g), hash(parent(g), HASHINGCONST)))
+        g_im = reduce!.(g(domain(parent(g))))
+        g.savedhash = hash(g_im, hash(typeof(g), hash(parent(g), HASHINGCONST)))
         g.modified = false
         end
     return xor(g.savedhash, h)
@@ -249,11 +249,9 @@ function (==)(g::Automorphism{N}, h::Automorphism{N}) where N
     g_im = reduce!.(g(domain(parent(g))))
     h_im = reduce!.(h(domain(parent(h))))
     # cheap:
-    g.savedhash = hash(g_im,
-        hash(typeof(g), hash(parent(g), HASHINGCONST)))
+    g.savedhash = hash(g_im, hash(typeof(g), hash(parent(g), HASHINGCONST)))
     g.modified = false
-    h.savedhash = hash(h_im,
-        hash(typeof(h), hash(parent(h), HASHINGCONST)))
+    h.savedhash = hash(h_im, hash(typeof(h), hash(parent(h), HASHINGCONST)))
     h.modified = false
 
     return g_im == h_im