diff --git a/reactos/subsystems/csr/csrsrv/csrsrv.def b/reactos/subsystems/csr/csrsrv/csrsrv.def
deleted file mode 100644
index e0577498c78..00000000000
--- a/reactos/subsystems/csr/csrsrv/csrsrv.def
+++ /dev/null
@@ -1,38 +0,0 @@
-LIBRARY CSRSRV
-
-EXPORTS
-CsrAddStaticServerThread@12
-CsrCallServerFromServer@8
-CsrConnectToUser@0
-CsrCreateProcess@24
-CsrCreateRemoteThread@8
-CsrCreateThread@12
-CsrCreateWait@24
-CsrDebugProcess@4
-CsrDebugProcessStop@4
-CsrDereferenceProcess@4
-CsrDereferenceThread@4
-CsrDereferenceWait@4
-CsrDestroyProcess@8
-CsrDestroyThread@4
-CsrExecServerThread@8
-CsrGetProcessLuid@8
-CsrImpersonateClient@4
-CsrLockProcessByClientId@8
-CsrLockThreadByClientId@8
-CsrMoveSatisfiedWait@8
-CsrNotifyWait@16
-CsrPopulateDosDevices@0
-CsrQueryApiPort@0
-CsrReferenceThread@4
-CsrRevertToSelf@0
-CsrServerInitialization@8
-CsrSetBackgroundPriority@4
-CsrSetCallingSpooler@4
-CsrSetForegroundPriority@4
-CsrShutdownProcesses@8
-CsrUnhandledExceptionFilter@8
-CsrUnlockProcess@4
-CsrUnlockThread@4
-CsrValidateMessageBuffer@16
-CsrValidateMessageString@8
diff --git a/reactos/subsystems/csr/csrsrv/csrsrv.rbuild b/reactos/subsystems/csr/csrsrv/csrsrv.rbuild
index 3f3fdd68091..1238af76e20 100644
--- a/reactos/subsystems/csr/csrsrv/csrsrv.rbuild
+++ b/reactos/subsystems/csr/csrsrv/csrsrv.rbuild
@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <!DOCTYPE module SYSTEM "../../../tools/rbuild/project.dtd">
 <module name="csrsrv" type="nativedll">
-	<importlibrary definition="csrsrv.def" />
+	<importlibrary definition="csrsrv.spec" />
 	<include base="csrsrv">.</include>
 	<include base="csr">.</include>
 	<include base="ReactOS">include/reactos/subsys</include>
diff --git a/reactos/subsystems/csr/csrsrv/csrsrv.spec b/reactos/subsystems/csr/csrsrv/csrsrv.spec
new file mode 100644
index 00000000000..e2ea60f5587
--- /dev/null
+++ b/reactos/subsystems/csr/csrsrv/csrsrv.spec
@@ -0,0 +1,35 @@
+@ stdcall CsrAddStaticServerThread(ptr ptr long)
+@ stdcall CsrCallServerFromServer(ptr ptr)
+@ stdcall CsrConnectToUser()
+@ stdcall CsrCreateProcess(ptr ptr ptr ptr long ptr)
+@ stdcall CsrCreateRemoteThread(ptr ptr)
+@ stdcall CsrCreateThread(ptr ptr ptr)
+@ stdcall CsrCreateWait(ptr ptr ptr ptr ptr ptr)
+@ stdcall CsrDebugProcess(ptr)
+@ stdcall CsrDebugProcessStop(ptr)
+@ stdcall CsrDereferenceProcess(ptr)
+@ stdcall CsrDereferenceThread(ptr)
+@ stdcall CsrDereferenceWait(ptr)
+@ stdcall CsrDestroyProcess(ptr long)
+@ stdcall CsrDestroyThread(ptr)
+@ stdcall CsrExecServerThread(ptr long)
+@ stdcall CsrGetProcessLuid(ptr ptr)
+@ stdcall CsrImpersonateClient(ptr)
+@ stdcall CsrLockProcessByClientId(ptr ptr)
+@ stdcall CsrLockThreadByClientId(ptr ptr)
+@ stdcall CsrMoveSatisfiedWait(ptr ptr)
+@ stdcall CsrNotifyWait(ptr long ptr ptr)
+@ stdcall CsrPopulateDosDevices(ptr ptr)
+@ stdcall CsrQueryApiPort()
+@ stdcall CsrReferenceThread(ptr)
+@ stdcall CsrRevertToSelf()
+@ stdcall CsrServerInitialization(long ptr)
+@ stdcall CsrSetBackgroundPriority(ptr)
+@ stdcall CsrSetCallingSpooler(long)
+@ stdcall CsrSetForegroundPriority(ptr)
+@ stdcall CsrShutdownProcesses(ptr long)
+@ stdcall CsrUnhandledExceptionFilter(ptr ptr)
+@ stdcall CsrUnlockProcess(ptr)
+@ stdcall CsrUnlockThread(ptr)
+@ stdcall CsrValidateMessageBuffer(ptr ptr long long)
+@ stdcall CsrValidateMessageString(ptr ptr)