diff --git a/include/ela/ela.h b/include/ela/ela.h
index d2b2f54..cc8902a 100644
--- a/include/ela/ela.h
+++ b/include/ela/ela.h
@@ -20,12 +20,17 @@
  */
 
 #include <stdint.h>
-#include <sys/time.h>
+
+#if !defined(_MSC_VER)
+# include <sys/time.h>
+#endif
 
 /* GCC visibility */
 #if defined(__GNUC__) && __GNUC__ >= 4 /** mkdoc:skip */
 /** @internal */
 # define ELA_EXPORT __attribute__ ((visibility("default")))
+#elif defined(_MSC_VER) /** mkdoc:skip */
+# define ELA_EXPORT __declspec(dllexport)
 #else
 /** @internal */
 # define ELA_EXPORT
diff --git a/include/ela/libevent.h b/include/ela/libevent.h
index 5a64555..832b489 100644
--- a/include/ela/libevent.h
+++ b/include/ela/libevent.h
@@ -27,6 +27,7 @@ struct event_base;
 
    @returns an event loop, or NULL if libevent support is unavailable.
  */
+ELA_EXPORT
 struct ela_el *ela_libevent(struct event_base *event);
 
 #endif
diff --git a/src/ela.c b/src/ela.c
index 78073d8..e59a3d0 100644
--- a/src/ela.c
+++ b/src/ela.c
@@ -16,9 +16,9 @@
 #include <string.h>
 
 #if 0
-# define DBG(a...) printf(a)
+# define DBG(a, ...) printf(a, __VA_ARGS__)
 #else
-# define DBG(a...) do{}while(0)
+# define DBG(a, ...) do{}while(0)
 #endif
 
 ela_error_t ela_set_fd(
diff --git a/src/ela_libevent.c b/src/ela_libevent.c
index d16292e..2cdb48a 100644
--- a/src/ela_libevent.c
+++ b/src/ela_libevent.c
@@ -23,6 +23,12 @@
 
 #include <event.h>
 
+#if defined(__GNUC__)
+#define INITIALIZER(f) \
+    static void f(void) __attribute__((constructor)); \
+    static void f(void)
+#endif
+
 struct libevent_mainloop
 {
     struct ela_el base;
@@ -79,6 +85,8 @@ ela_error_t _ela_event_set_fd(
 {
     struct libevent_mainloop *ctx = (struct libevent_mainloop *)ctx_;
     ela_error_t err = 0;
+    uint32_t fd_flags
+        = (ELA_EVENT_ONCE|ELA_EVENT_READABLE|ELA_EVENT_WRITABLE);
 
     (void)ctx;
 
@@ -88,9 +96,6 @@ ela_error_t _ela_event_set_fd(
     if ( ela_flags & ELA_EVENT_READABLE ) ev_flags |= EV_READ;
     if ( ela_flags & ELA_EVENT_WRITABLE ) ev_flags |= EV_WRITE;
 
-    const uint32_t fd_flags
-        = (ELA_EVENT_ONCE|ELA_EVENT_READABLE|ELA_EVENT_WRITABLE);
-
     src->flags = (src->flags & ~fd_flags) | (ela_flags & fd_flags);
 
     event_set(&src->event, fd, ev_flags, _ela_event_cb, src);
@@ -161,14 +166,14 @@ static
 void _ela_event_run(struct ela_el *ctx_)
 {
     struct libevent_mainloop *ctx = (struct libevent_mainloop *)ctx_;
-	event_base_dispatch(ctx->event);
+    event_base_dispatch(ctx->event);
 }
 
 static
 void _ela_event_exit(struct ela_el *ctx_)
 {
     struct libevent_mainloop *ctx = (struct libevent_mainloop *)ctx_;
-	event_base_loopbreak(ctx->event);
+    event_base_loopbreak(ctx->event);
 }
 
 static
@@ -241,8 +246,26 @@ struct ela_el *ela_libevent(struct event_base *event)
     return &m->base;
 }
 
-__attribute__((constructor))
-static void _ela_event_register(void)
+#if defined(_MSC_VER)
+BOOLEAN WINAPI
+DllMain(IN HINSTANCE hDllHandle, IN DWORD nReason, IN LPVOID Reserved)
+{
+    switch (nReason) {
+    case DLL_PROCESS_ATTACH:
+        //DisableThreadLibraryCalls(hDllHandle);
+        ela_register(&event_backend);
+        break;
+    case DLL_PROCESS_DETACH:
+    case DLL_THREAD_ATTACH:
+    case DLL_THREAD_DETACH:
+        break;
+    }
+
+    return TRUE;
+}
+#else
+INITIALIZER(_ela_event_register)
 {
     ela_register(&event_backend);
 }
+#endif