diff --git a/dlpdb/coords2angles.py b/dlpdb/coords2angles.py
index 7d46987..6ea43f5 100755
--- a/dlpdb/coords2angles.py
+++ b/dlpdb/coords2angles.py
@@ -61,8 +61,8 @@ def Coords2AnglesLengths(r0, r1, r2):
         cos_theta = 1.0
     elif (cos_theta < -1.0):
         cos_theta = -1.0
-
     theta = acos(cos_theta)
+    return (theta, l10, l21)
 
 
 
diff --git a/setup.py b/setup.py
index 9e4d30d..1bea334 100644
--- a/setup.py
+++ b/setup.py
@@ -16,9 +16,9 @@
 
   url='https://github.com/jewettaij/dlpdb',
 
-  download_url='https://github.com/jewettaij/dlpdb/archive/v0.5.0.zip',
+  download_url='https://github.com/jewettaij/dlpdb/archive/v0.5.1.zip',
 
-  version='0.5.0',
+  version='0.5.1',
 
   license='MIT',