Index: src/OFPlugin.h
==================================================================
--- src/OFPlugin.h
+++ src/OFPlugin.h
@@ -17,13 +17,18 @@
 #import "OFObject.h"
 
 @class OFString;
 
 #ifndef OF_WINDOWS
+# include <dlfcn.h>
+# define OF_RTLD_LAZY RTLD_LAZY
+# define OF_RTLD_NOW  RTLD_NOW
 typedef void* of_plugin_handle_t;
 #else
 # include <windows.h>
+# define OF_RTLD_LAZY 0
+# define OF_RTLD_NOW  0
 typedef HMODULE of_plugin_handle_t;
 #endif
 
 OF_ASSUME_NONNULL_BEGIN
 

Index: src/OFPlugin.m
==================================================================
--- src/OFPlugin.m
+++ src/OFPlugin.m
@@ -36,10 +36,13 @@
 {
 #ifndef OF_WINDOWS
 	return dlopen([path cStringWithEncoding:
 	    [OFSystemInfo native8BitEncoding]], flags);
 #else
+	if (path == nil)
+		return GetModuleHandle(NULL);
+
 	return LoadLibraryW([path UTF16String]);
 #endif
 }
 
 void*
@@ -46,11 +49,11 @@
 of_dlsym(of_plugin_handle_t handle, const char *symbol)
 {
 #ifndef OF_WINDOWS
 	return dlsym(handle, symbol);
 #else
-	return GetProcAddress(handle, symbol);
+	return (void*)(uintptr_t)GetProcAddress(handle, symbol);
 #endif
 }
 
 void
 of_dlclose(of_plugin_handle_t handle)
@@ -70,11 +73,11 @@
 	init_plugin_t initPlugin;
 	OFPlugin *plugin;
 
 	path = [path stringByAppendingString: @PLUGIN_SUFFIX];
 
-	if ((handle = of_dlopen(path, RTLD_LAZY)) == NULL)
+	if ((handle = of_dlopen(path, OF_RTLD_LAZY)) == NULL)
 		@throw [OFInitializationFailedException
 		    exceptionWithClass: self];
 
 	objc_autoreleasePoolPop(pool);