diff --git a/src/_watchdog_fsevents.c b/src/_watchdog_fsevents.c
index 8ab109f9..bd5d515a 100644
--- a/src/_watchdog_fsevents.c
+++ b/src/_watchdog_fsevents.c
@@ -215,12 +215,18 @@ static PyMethodDef _watchdog_fseventsmethods[] =
 
 
 /**
- * Adds all the module attributes.
+ * Adds all the _watchdog_fsevents module attributes and is meant only to be
+ * called within the module initialization function.
  *
  * :param module:
  *     The module to which attributes will be added.
  * :type module:
  *     A pointer to a Python object representing a module.
+ *
+ * Attributes added:
+ *     __version__: tuple denoting the version number of the module.
+ *     VERSION_INFO: tuple denoting the version number of the module.
+ *     VERSION_STRING: string denoting the version number of the module.
  */
 static void
 Watchdog_AddModuleAttributes(PyObject *module)
@@ -236,16 +242,30 @@ Watchdog_AddModuleAttributes(PyObject *module)
     PyModule_AddIntConstant(module,
                             MODULE_CONSTANT_NAME_POLLOUT,
                             kCFFileDescriptorWriteCallBack);
+    /* Version tuple */
     PyModule_AddObject(module,
                        MODULE_ATTRIBUTE_NAME_VERSION,
                        version_tuple);
     PyModule_AddObject(module,
                        MODULE_ATTRIBUTE_NAME_VERSION_INFO,
                        version_tuple);
+    /* Version string */
     PyModule_AddObject(module,
                        MODULE_ATTRIBUTE_NAME_VERSION_STRING,
                        Py_BuildValue("s",
                                      WATCHDOG_VERSION_STRING));
+    /* major version */
+    PyModule_AddIntConstant(module,
+                            MODULE_CONSTANT_NAME_VERSION_MAJOR,
+                            WATCHDOG_VERSION_MAJOR);
+    /* minor version */
+    PyModule_AddIntConstant(module,
+                            MODULE_CONSTANT_NAME_VERSION_MINOR,
+                            WATCHDOG_VERSION_MINOR);
+    /* build version */
+    PyModule_AddIntConstant(module,
+                            MODULE_CONSTANT_NAME_VERSION_BUILD,
+                            WATCHDOG_VERSION_BUILD);
 }
 
 
diff --git a/src/_watchdog_fsevents.h b/src/_watchdog_fsevents.h
index 8ebecd6a..9c57237f 100644
--- a/src/_watchdog_fsevents.h
+++ b/src/_watchdog_fsevents.h
@@ -57,6 +57,9 @@ typedef int Py_ssize_t;
 #define MODULE_NAME "_watchdog_fsevents"
 #define MODULE_CONSTANT_NAME_POLLIN "POLLIN"
 #define MODULE_CONSTANT_NAME_POLLOUT "POLLOUT"
+#define MODULE_CONSTANT_NAME_VERSION_MAJOR "VERSION_MAJOR"
+#define MODULE_CONSTANT_NAME_VERSION_MINOR "VERSION_MINOR"
+#define MODULE_CONSTANT_NAME_VERSION_BUILD "VERSION_BUILD"
 #define MODULE_ATTRIBUTE_NAME_VERSION "__version__"
 #define MODULE_ATTRIBUTE_NAME_VERSION_INFO "VERSION_INFO"
 #define MODULE_ATTRIBUTE_NAME_VERSION_STRING "VERSION_STRING"
@@ -90,7 +93,8 @@ typedef struct _StreamCallbackInfo
 } StreamCallbackInfo;
 
 /**
- * Macro that forces returning NULL if given argument is NULL.
+ * Macro that forces returning NULL from the caller function if given argument
+ * is NULL.
  */
 #define RETURN_NULL_IF_NULL(o)                  \
     do                                          \
@@ -100,7 +104,8 @@ typedef struct _StreamCallbackInfo
     while(0)
 
 /**
- * Macro that forces returning NULL if given argument is true.
+ * Macro that forces returning NULL from the caller function if given argument
+ * is truthy.
  */
 #define RETURN_NULL_IF(c)                       \
     do                                          \
@@ -110,7 +115,8 @@ typedef struct _StreamCallbackInfo
     while(0)
 
 /**
- * Macro that forces returning NULL if given argument is false.
+ * Macro that forces returning NULL from the caller function if given argument
+ * is falsy.
  */
 #define RETURN_NULL_IF_NOT(c)                   \
     do                                          \
@@ -120,7 +126,8 @@ typedef struct _StreamCallbackInfo
     while(0)
 
 /**
- * Macro that forces returning if given argument is true.
+ * Macro that forces returning from the caller function if given argument is
+ * truthy.
  */
 #define RETURN_IF(c)                            \
     do                                          \
@@ -130,7 +137,8 @@ typedef struct _StreamCallbackInfo
     while(0)
 
 /**
- * Macro that forces returning if given argument is false.
+ * Macro that forces returning from the caller function if given argument is
+ * falsy.
  */
 #define RETURN_IF_NOT(c)                        \
     do                                          \
@@ -139,13 +147,15 @@ typedef struct _StreamCallbackInfo
         }                                       \
     while(0)
 
+/**
+ * Latency (float) for the event streams registered with the FSEvents API.
+ */
 #define FS_EVENT_STREAM_LATENCY (0.01)
 
-/* Initialization. */
+/* Initializes internal data structures when the module is initialized. */
 void
 Watchdog_FSEvents_Init(void);
 
-
 /* CFRunLoopForEmitter global dict functions. */
 CFRunLoopRef
 Watchdog_CFRunLoopForEmitter_GetItem(PyObject *emitter_thread);