diff --git a/ext/numo/narray/narray.def b/ext/numo/narray/narray.def
index 664b1f22..d24c6ffd 100644
--- a/ext/numo/narray/narray.def
+++ b/ext/numo/narray/narray.def
@@ -26,3 +26,17 @@ na_ndloop3
 na_ndloop4
 nary_info_str
 nary_test_reduce
+numo_cBit
+numo_cDFloat
+numo_cSFloat
+numo_cDComplex
+numo_cSComplex
+numo_cInt64
+numo_cInt32
+numo_cInt16
+numo_cInt8
+numo_cUInt64
+numo_cUInt32
+numo_cUInt16
+numo_cUInt8
+numo_cRObject