1 files changed, 1 insertions, 1 deletions
diff --git a/lib/matrix.rb b/lib/matrix.rb
index cf23d4159d..7a3857ae99 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -1752,7 +1752,7 @@ class Vector
 
     p = 0
     each2(v) {|v1, v2|
-      p += v1 * v2
+      p += v1 * v2.conj
     }
     p
   end