diff --git a/SoundBrotching/soundbrotch.f90 b/SoundBrotching/soundbrotch.f90
index 93196ab..b92e83d 100644
--- a/SoundBrotching/soundbrotch.f90
+++ b/SoundBrotching/soundbrotch.f90
@@ -6,6 +6,10 @@ module soundbrotch
     integer             :: left
     integer             :: right
   end type
+  type t_sample2r
+    real                :: left
+    real                :: right
+  end type
   ! ---------------------------------------------------------
   !      some private variables