diff --git a/MANIFEST.in b/MANIFEST.in
index 05861873..167cc16c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -12,6 +12,7 @@ include GPy/installation.cfg
 
 # Cython
 recursive-include GPy *.c
+recursive-include GPy *.h
 recursive-include GPy *.so
 recursive-include GPy *.pyx