diff --git a/source/eventcore/drivers/posix/driver.d b/source/eventcore/drivers/posix/driver.d
index 10c9551..e56f6d9 100644
--- a/source/eventcore/drivers/posix/driver.d
+++ b/source/eventcore/drivers/posix/driver.d
@@ -191,13 +191,7 @@ final class PosixEventDriverCore(Loop : PosixEventLoop, Timers : EventDriverTime
 		m_events = events;
 		m_processes = processes;
 		m_wakeupEvent = events.createInternal();
-
-		static if (__VERSION__ >= 2074)
-			m_threadCallbackMutex = mallocT!(shared(Mutex));
-		else {
-			() @trusted { m_threadCallbackMutex = cast(shared)mallocT!Mutex; } ();
-		}
-
+        m_threadCallbackMutex = mallocT!(shared(Mutex));
 		m_threadCallbacks = mallocT!(ConsumableQueue!ThreadCallbackEntry);
 		m_threadCallbacks.reserve(1000);
 	}
diff --git a/source/eventcore/drivers/posix/sockets.d b/source/eventcore/drivers/posix/sockets.d
index 4acb54f..8e03ae2 100644
--- a/source/eventcore/drivers/posix/sockets.d
+++ b/source/eventcore/drivers/posix/sockets.d
@@ -42,13 +42,7 @@ version (linux) {
 	static if (!is(typeof(SOCK_CLOEXEC)))
 		enum SOCK_CLOEXEC = 0x80000;
 
-	static if (__VERSION__ < 2077)
-	{
-		enum IP_ADD_MEMBERSHIP =  35;
-		enum IP_MULTICAST_LOOP =  34;
-	}
-	else
-		import core.sys.linux.netinet.in_ : IP_ADD_MEMBERSHIP, IP_MULTICAST_LOOP;
+    import core.sys.linux.netinet.in_ : IP_ADD_MEMBERSHIP, IP_MULTICAST_LOOP;
 
 	// Linux-specific TCP options
 	// https://github.com/torvalds/linux/blob/master/include/uapi/linux/tcp.h#L95
@@ -65,18 +59,12 @@ version (linux) {
 		enum TCP_USER_TIMEOUT = 18;
 }
 version (OSX) {
-	static if (__VERSION__ < 2077) {
-		enum IP_ADD_MEMBERSHIP = 12;
-		enum IP_MULTICAST_LOOP = 11;
-	} else import core.sys.darwin.netinet.in_ : IP_ADD_MEMBERSHIP, IP_MULTICAST_LOOP;
+    import core.sys.darwin.netinet.in_ : IP_ADD_MEMBERSHIP, IP_MULTICAST_LOOP;
 
 	static if (!is(typeof(ESHUTDOWN))) enum ESHUTDOWN = 58;
 }
 version (FreeBSD) {
-	static if (__VERSION__ < 2077) {
-		enum IP_ADD_MEMBERSHIP  = 12;
-		enum IP_MULTICAST_LOOP  = 11;
-	} else import core.sys.freebsd.netinet.in_ : IP_ADD_MEMBERSHIP, IP_MULTICAST_LOOP;
+    import core.sys.freebsd.netinet.in_ : IP_ADD_MEMBERSHIP, IP_MULTICAST_LOOP;
 }
 version (DragonFlyBSD) {
 	import core.sys.dragonflybsd.netinet.in_ : IP_ADD_MEMBERSHIP, IP_MULTICAST_LOOP;
diff --git a/source/eventcore/drivers/threadedfile.d b/source/eventcore/drivers/threadedfile.d
index 5b04421..c3b9dd4 100644
--- a/source/eventcore/drivers/threadedfile.d
+++ b/source/eventcore/drivers/threadedfile.d
@@ -13,10 +13,7 @@ version (Posix) {
 	import core.sys.posix.unistd;
 }
 version (Windows) {
-	static if (__VERSION__ >= 2070)
-		import core.sys.windows.stat;
-	else
-		import std.c.windows.stat;
+    import core.sys.windows.stat;
 
 	private {
 		// TODO: use CreateFile/HANDLE instead of the Posix API on Windows
diff --git a/source/eventcore/drivers/winapi/core.d b/source/eventcore/drivers/winapi/core.d
index 16aa0a9..f7070da 100644
--- a/source/eventcore/drivers/winapi/core.d
+++ b/source/eventcore/drivers/winapi/core.d
@@ -45,12 +45,7 @@ final class WinAPIEventDriverCore : EventDriverCore {
 		m_fileCompletionEvent = () @trusted { return CreateEventW(null, false, false, null); } ();
 		registerEvent(m_fileCompletionEvent);
 		m_ioEvents = mallocT!(ConsumableQueue!IOEvent);
-
-		static if (__VERSION__ >= 2074)
-			m_threadCallbackMutex = mallocT!(shared(Mutex));
-		else {
-			() @trusted { m_threadCallbackMutex = cast(shared)mallocT!Mutex; } ();
-		}
+        m_threadCallbackMutex = mallocT!(shared(Mutex));
 		m_threadCallbacks = mallocT!(ConsumableQueue!ThreadCallbackEntry);
 		m_threadCallbacks.reserve(1000);
 	}