diff --git a/sml/src/sml_boolean.c b/sml/src/sml_boolean.c
index 1b2b988..50edd3d 100644
--- a/sml/src/sml_boolean.c
+++ b/sml/src/sml_boolean.c
@@ -55,7 +55,7 @@ void sml_boolean_write(sml_boolean *boolean, sml_buffer *buf) {
 	}
 	
     sml_buf_set_type_and_length(buf, SML_TYPE_BOOLEAN, 1);
-    if (boolean == SML_BOOLEAN_FALSE) {
+    if (*boolean == SML_BOOLEAN_FALSE) {
         buf->buffer[buf->cursor] = SML_BOOLEAN_FALSE;
     }
     else {
diff --git a/test/src/sml_boolean_test.c b/test/src/sml_boolean_test.c
index b2f016e..60960c6 100644
--- a/test/src/sml_boolean_test.c
+++ b/test/src/sml_boolean_test.c
@@ -58,12 +58,18 @@ TEST(sml_boolean, parse_optional) {
 	TEST_ASSERT_NULL(b);
 }
 
-TEST(sml_boolean, write) {
+TEST(sml_boolean, write_true) {
 	sml_boolean *b = sml_boolean_init(SML_BOOLEAN_TRUE);
 	sml_boolean_write(b, buf);
 	expected_buf(buf, "42FF", 2);
 }
 
+TEST(sml_boolean, write_false) {
+	sml_boolean *b = sml_boolean_init(SML_BOOLEAN_FALSE);
+	sml_boolean_write(b, buf);
+	expected_buf(buf, "4200", 2);
+}
+
 TEST(sml_boolean, write_optional) {
 	sml_boolean_write(0, buf);
 	expected_buf(buf, "01", 1);
@@ -75,6 +81,7 @@ TEST_GROUP_RUNNER(sml_boolean) {
 	RUN_TEST_CASE(sml_boolean, parse_true);
 	RUN_TEST_CASE(sml_boolean, parse_false);
 	RUN_TEST_CASE(sml_boolean, parse_optional);	
-	RUN_TEST_CASE(sml_boolean, write);
+	RUN_TEST_CASE(sml_boolean, write_true);
+	RUN_TEST_CASE(sml_boolean, write_false);
 	RUN_TEST_CASE(sml_boolean, write_optional);
 }