diff --git a/arraylist.c b/arraylist.c
index d8e12d1..7e12d98 100644
--- a/arraylist.c
+++ b/arraylist.c
@@ -166,13 +166,13 @@ int array_list_add(struct array_list *arr, void *data)
 	return 0;
 }
 
-void array_list_sort(struct array_list *arr, int (*compar)(const void *, const void *))
+void array_list_sort(struct array_list *arr, int(__cdecl *compar)(const void *, const void *))
 {
 	qsort(arr->array, arr->length, sizeof(arr->array[0]), compar);
 }
 
 void *array_list_bsearch(const void **key, struct array_list *arr,
-                         int (*compar)(const void *, const void *))
+                         int(__cdecl *compar)(const void *, const void *))
 {
 	return bsearch(key, arr->array, arr->length, sizeof(arr->array[0]), compar);
 }
diff --git a/arraylist.h b/arraylist.h
index f541706..65b8acf 100644
--- a/arraylist.h
+++ b/arraylist.h
@@ -68,10 +68,11 @@ extern int array_list_add(struct array_list *al, void *data);
 
 extern size_t array_list_length(struct array_list *al);
 
-extern void array_list_sort(struct array_list *arr, int (*compar)(const void *, const void *));
+extern void array_list_sort(struct array_list *arr,
+                            int(__cdecl *compar)(const void *, const void *));
 
 extern void *array_list_bsearch(const void **key, struct array_list *arr,
-                                int (*compar)(const void *, const void *));
+                                int(__cdecl *compar)(const void *, const void *));
 
 extern int array_list_del_idx(struct array_list *arr, size_t idx, size_t count);
 
diff --git a/json_object.c b/json_object.c
index 9df5809..b50a33d 100644
--- a/json_object.c
+++ b/json_object.c
@@ -1463,7 +1463,8 @@ struct array_list *json_object_get_array(const struct json_object *jso)
 	}
 }
 
-void json_object_array_sort(struct json_object *jso, int (*sort_fn)(const void *, const void *))
+void json_object_array_sort(struct json_object *jso,
+                            int(__cdecl *sort_fn)(const void *, const void *))
 {
 	assert(json_object_get_type(jso) == json_type_array);
 	array_list_sort(JC_ARRAY(jso)->c_array, sort_fn);
@@ -1471,7 +1472,7 @@ void json_object_array_sort(struct json_object *jso, int (*sort_fn)(const void *
 
 struct json_object *json_object_array_bsearch(const struct json_object *key,
                                               const struct json_object *jso,
-                                              int (*sort_fn)(const void *, const void *))
+                                              int(__cdecl *sort_fn)(const void *, const void *))
 {
 	struct json_object **result;
 
diff --git a/json_object.h b/json_object.h
index d67f384..06c0349 100644
--- a/json_object.h
+++ b/json_object.h
@@ -556,7 +556,7 @@ JSON_EXPORT size_t json_object_array_length(const struct json_object *obj);
 * @param sort_fn a sorting function
 */
 JSON_EXPORT void json_object_array_sort(struct json_object *jso,
-                                        int (*sort_fn)(const void *, const void *));
+                                        int(__cdecl *sort_fn)(const void *, const void *));
 
 /** Binary search a sorted array for a specified key object.
  *
@@ -574,7 +574,7 @@ JSON_EXPORT void json_object_array_sort(struct json_object *jso,
  */
 JSON_EXPORT struct json_object *
 json_object_array_bsearch(const struct json_object *key, const struct json_object *jso,
-                          int (*sort_fn)(const void *, const void *));
+                          int(__cdecl *sort_fn)(const void *, const void *));
 
 /** Add an element to the end of a json_object of type json_type_array
  *
diff --git a/strerror_override.c b/strerror_override.c
index a3dd377..694f816 100644
--- a/strerror_override.c
+++ b/strerror_override.c
@@ -60,7 +60,7 @@ static struct
 
 // Enabled during tests
 static int _json_c_strerror_enable = 0;
-extern char *getenv(const char *name); // Avoid including stdlib.h
+extern char * __cdecl getenv(const char *name); // Avoid including stdlib.h
 
 #define PREFIX "ERRNO="
 static char errno_buf[128] = PREFIX;