diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2daae68..4297412 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ All notable changes to this project will be documented in this file.
 #### Changed
 - Add auto-type conversion (uint<->sint) to `yyjson_ptr_get_uint/sint()`: #152
 
+#### Fixed
+- Fix incorrect output in environments lacking native `bool` type support: #161
+
 
 ## 0.8.0 (2023-09-13)
 #### Added
diff --git a/src/yyjson.h b/src/yyjson.h
index de4e327..8f727e9 100644
--- a/src/yyjson.h
+++ b/src/yyjson.h
@@ -5673,6 +5673,7 @@ yyjson_api_inline yyjson_mut_val *yyjson_mut_bool(yyjson_mut_doc *doc,
     if (yyjson_likely(doc)) {
         yyjson_mut_val *val = unsafe_yyjson_mut_val(doc, 1);
         if (yyjson_likely(val)) {
+            _val = !!_val;
             val->tag = YYJSON_TYPE_BOOL | (uint8_t)((uint8_t)_val << 3);
             return val;
         }
@@ -5925,7 +5926,8 @@ yyjson_api_inline yyjson_mut_val *yyjson_mut_arr(yyjson_mut_doc *doc) {
 yyjson_api_inline yyjson_mut_val *yyjson_mut_arr_with_bool(
     yyjson_mut_doc *doc, const bool *vals, size_t count) {
     yyjson_mut_arr_with_func({
-        val->tag = YYJSON_TYPE_BOOL | (uint8_t)((uint8_t)vals[i] << 3);
+        bool _val = !!vals[i];
+        val->tag = YYJSON_TYPE_BOOL | (uint8_t)((uint8_t)_val << 3);
     });
 }
 
@@ -6877,6 +6879,7 @@ yyjson_api_inline bool yyjson_mut_obj_add_bool(yyjson_mut_doc *doc,
                                                const char *_key,
                                                bool _val) {
     yyjson_mut_obj_add_func({
+        _val = !!_val;
         val->tag = YYJSON_TYPE_BOOL | (uint8_t)((uint8_t)(_val) << 3);
     });
 }
diff --git a/test/test_json_writer.c b/test/test_json_writer.c
index a34997e..4ac594c 100644
--- a/test/test_json_writer.c
+++ b/test/test_json_writer.c
@@ -976,6 +976,41 @@ yy_test_case(test_json_writer) {
         char *json = yyjson_mut_val_write_opts(&root, 0, &alc, NULL, NULL);
         yy_assert(strcmp(json, expect) == 0);
     }
+    
+    // test bool conversion
+    // some environments don't have a native bool type
+    // and the bool type may store values other than 0/1
+    {
+        yyjson_mut_doc *mdoc = yyjson_mut_doc_new(NULL);
+        yyjson_mut_val *mobj = yyjson_mut_obj(mdoc);
+        yyjson_mut_doc_set_root(mdoc, mobj);
+        
+        for (u8 i = 0; i < 10; i++) {
+            char str[2];
+            snprintf(str, sizeof(str), "%d", (int)i);
+            yyjson_mut_val *key = yyjson_mut_strcpy(mdoc, str);
+            yyjson_mut_val *val = yyjson_mut_bool(mdoc, (bool)i);
+            yyjson_mut_obj_add(mobj, key, val);
+        }
+        
+        char *json = yyjson_mut_write(mdoc, YYJSON_WRITE_PRETTY, NULL);
+        yy_assert(json != NULL);
+        
+        yyjson_doc *doc = yyjson_read(json, strlen(json), 0);
+        yyjson_val *obj = yyjson_doc_get_root(doc);
+        yy_assert(yyjson_obj_size(obj) == 10);
+        for (u8 i = 0; i < 10; i++) {
+            char str[2];
+            snprintf(str, sizeof(str), "%d", (int)i);
+            yyjson_val *val = yyjson_obj_get(obj, str);
+            yy_assert(yyjson_is_bool(val));
+            yy_assert(yyjson_get_bool(val) == (i != 0));
+        }
+        
+        yyjson_mut_doc_free(mdoc);
+        yyjson_doc_free(doc);
+        free(json);
+    }
 }
 
 #else