diff --git a/pyext/setup.py.in b/pyext/setup.py.in
index 5a891ed..623b975 100644
--- a/pyext/setup.py.in
+++ b/pyext/setup.py.in
@@ -7,7 +7,7 @@ setup(name='@PACKAGE_NAME@',
       url='http://gammalib.sourceforge.net/',
       py_modules=['ctatools'],
       ext_modules=[Extension('_ctatools', ['ctatools_wrap.cpp'],
-                             include_dirs=['@prefix@/include/gammalib', '@top_srcdir@/src/ctbin', '@top_srcdir@/src/ctselect'],
+                             include_dirs=['@prefix@/include/gammalib', '@top_srcdir@/src/ctselect', '@top_srcdir@/src/ctbin', '@top_srcdir@/src/ctlike'],
                              library_dirs=['@prefix@/lib'],
                              libraries=['ctatools','gamma','cfitsio'],
                              runtime_library_dirs=['@prefix@/lib'])],