diff --git a/Makefile.am b/Makefile.am
index ff4c9ec..b7a95a2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -51,13 +51,13 @@ dist_noinst_DATA = \
 	example.c \
 	testinput.c
 	
+if HAVE_LIBGCRYPT
 noinst_PROGRAMS = test
 test_SOURCES = test.c
-test_CFLAGS = $(libbase58_CFLAGS) $(JANSSON_CFLAGS)
-test_LDADD = $(libbase58_LIBS) libblkmaker-@LIBBLKMAKER_API_VERSION@.la libblkmaker_jansson-@LIBBLKMAKER_API_VERSION@.la $(JANSSON_LIBS)
+test_CFLAGS = $(libbase58_CFLAGS) $(JANSSON_CFLAGS) $(LIBGCRYPT_CFLAGS)
+test_LDADD = $(libbase58_LIBS) libblkmaker-@LIBBLKMAKER_API_VERSION@.la libblkmaker_jansson-@LIBBLKMAKER_API_VERSION@.la $(JANSSON_LIBS) $(LIBGCRYPT_LIBS)
 TESTS = test
 
-if CAN_COMPILE_EXAMPLE
 EXTRA_PROGRAMS = example
 example_SOURCES = example.c
 example_CFLAGS = $(libbase58_CFLAGS) $(JANSSON_CFLAGS) $(LIBGCRYPT_CFLAGS)
diff --git a/configure.ac b/configure.ac
index 4671ca7..8072702 100644
--- a/configure.ac
+++ b/configure.ac
@@ -51,18 +51,18 @@ PKG_CHECK_MODULES([libbase58],[libbase58])
 
 AC_CHECK_LIB([ws2_32], [strchr])
 
-dnl libgcrypt necessary to build example.c with "make example"
+dnl libgcrypt necessary to build tests and example
 dnl check for libgcrypt:
 m4_ifdef([AM_PATH_LIBGCRYPT], [
 	AM_PATH_LIBGCRYPT([],
 		[
-			can_compile_example=yes
+			have_libgcrypt=yes
 		],[
-			can_compile_example=no
+			have_libgcrypt=no
 		])
 ],[
-	m4_warn([syntax], [AM_PATH_LIBGCRYPT missing; example will not be available])
+	m4_warn([syntax], [AM_PATH_LIBGCRYPT missing; example and tests will not be available])
 ])
-AM_CONDITIONAL([CAN_COMPILE_EXAMPLE], [test x$can_compile_example = xyes])
+AM_CONDITIONAL([HAVE_LIBGCRYPT], [test x$have_libgcrypt = xyes])
 
 AC_OUTPUT
diff --git a/test.c b/test.c
index 5c786e9..191d9c9 100644
--- a/test.c
+++ b/test.c
@@ -10,10 +10,17 @@
 #include <string.h>
 #include <time.h>
 
+#include <gcrypt.h>
+
 #include "blktemplate.h"
 #include "blkmaker.h"
 #include "blkmaker_jansson.h"
 
+static bool my_sha256(void *digest, const void *buffer, size_t length) {
+	gcry_md_hash_buffer(GCRY_MD_SHA256, digest, buffer, length);
+	return true;
+}
+
 static void capabilityname_test() {
 	for (unsigned int i = 0; i < GBT_CAPABILITY_COUNT; ++i) {
 		const gbt_capabilities_t capid = (1 << i);
@@ -423,6 +430,8 @@ static void blktmpl_jansson_bip9() {
 }
 
 int main() {
+	blkmk_sha256_impl = my_sha256;
+	
 	puts("capabilityname");
 	capabilityname_test();