diff --git a/hypua2jamo_build.py b/hypua2jamo_build.py
index 83dbcd6..adf8e65 100644
--- a/hypua2jamo_build.py
+++ b/hypua2jamo_build.py
@@ -35,8 +35,9 @@
 int hypua_p2jc_ucs2_encode(const unsigned short *src, int srclen, unsigned short *dst);
 int hypua_p2jd_ucs4_calcsize(const unsigned int *src, int srclen);
 int hypua_p2jd_ucs4_encode(const unsigned int *src, int srclen, unsigned int *dst);
-int hypua_p2jd_ucs2_calcsize(const unsigned int *src, int srclen);
+int hypua_p2jd_ucs2_calcsize(const unsigned short *src, int srclen);
 int hypua_p2jd_ucs2_encode(const unsigned short *src, int srclen, unsigned short *dst);
+void hypua_p2jd_ucs2_test();
 
 int hypua_jc2p_ucs4_calcsize(const unsigned int *src, int srclen);
 int hypua_jc2p_ucs4_decode(const unsigned int *src, int srclen, unsigned int *dst);
diff --git a/src/hypua2jamo-c/p2jc.cpp b/src/hypua2jamo-c/p2jc.cpp
index 87de226..618b6d2 100644
--- a/src/hypua2jamo-c/p2jc.cpp
+++ b/src/hypua2jamo-c/p2jc.cpp
@@ -21,7 +21,6 @@ extern "C" int hypua_p2jc_ucs2_calcsize(const uint16_t *src, int srclen) {
 
 
 extern "C" int hypua_p2jc_ucs2_encode(const uint16_t *src, int srclen, uint16_t *dst) {
-	printf("hypua_p2jc_ucs2_encode\n");
 	return encode(src, srclen, dst);
 }
 
diff --git a/src/hypua2jamo-c/p2jd.cpp b/src/hypua2jamo-c/p2jd.cpp
index 21b5bb5..2214bf6 100644
--- a/src/hypua2jamo-c/p2jd.cpp
+++ b/src/hypua2jamo-c/p2jd.cpp
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "config.h"
@@ -21,7 +22,6 @@ extern "C" int hypua_p2jd_ucs2_calcsize(const uint16_t *src, int srclen) {
 
 
 extern "C" int hypua_p2jd_ucs2_encode(const uint16_t *src, int srclen, uint16_t *dst) {
-	printf("hypua_p2jd_ucs2_encode\n");
 	return encode(src, srclen, dst);
 }
 
@@ -34,3 +34,14 @@ extern "C" int hypua_p2jd_ucs4_calcsize(const uint32_t *src, int srclen) {
 extern "C" int hypua_p2jd_ucs4_encode(const uint32_t *src, int srclen, uint32_t *dst) {
 	return encode(src, srclen, dst);
 }
+
+
+extern "C" void hypua_p2jd_ucs2_test() {
+	uint16_t src = 0xF7CA;
+	int size = hypua_p2jd_ucs2_calcsize(&src, 1);
+	void *buf = malloc(size);
+	int n_encoded = hypua_p2jd_ucs2_encode(&src, 1, (uint16_t*)buf);
+	printf("hypua_p2jd_ucs2_test: size=%d encoded=%d\n", size, n_encoded);
+	printf("p2jd_F7CA: len=%d\n", p2jd_F7CA[0]);
+	free(buf);
+}
diff --git a/tests/test_conversion.py b/tests/test_conversion.py
index 8d90026..87e2f95 100644
--- a/tests/test_conversion.py
+++ b/tests/test_conversion.py
@@ -367,6 +367,10 @@ def test_f7ca(self):
         jamo = encoder.encode(u'\uf7ca', final=True)
         self.assertEqual(u'\u1109\u1109', jamo)
 
+    def test_hypua_p2jd_ucs2(self):
+        from hypua2jamo._cffi import lib
+        lib.hypua_p2jd_ucs2_test()
+
 
 class ComposedJamoEncoderImplementationOnCythonTest(
     TestCase,