diff --git a/dlls/ntdll/signal_arm.c b/dlls/ntdll/signal_arm.c
index bbd6c59bb8e..2102dd0c604 100644
--- a/dlls/ntdll/signal_arm.c
+++ b/dlls/ntdll/signal_arm.c
@@ -944,14 +944,8 @@ NTSTATUS signal_alloc_thread( TEB **teb )
  */
 void signal_free_thread( TEB *teb )
 {
-    SIZE_T size;
+    SIZE_T size = 0;
 
-    if (teb->DeallocationStack)
-    {
-        size = 0;
-        NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
-    }
-    size = 0;
     NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
 }
 
diff --git a/dlls/ntdll/signal_arm64.c b/dlls/ntdll/signal_arm64.c
index 5b3e8879b8f..7f2977d9d3f 100644
--- a/dlls/ntdll/signal_arm64.c
+++ b/dlls/ntdll/signal_arm64.c
@@ -817,14 +817,8 @@ NTSTATUS signal_alloc_thread( TEB **teb )
  */
 void signal_free_thread( TEB *teb )
 {
-    SIZE_T size;
+    SIZE_T size = 0;
 
-    if (teb->DeallocationStack)
-    {
-        size = 0;
-        NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
-    }
-    size = 0;
     NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
 }
 
diff --git a/dlls/ntdll/signal_i386.c b/dlls/ntdll/signal_i386.c
index 4038436a426..671c35f35b5 100644
--- a/dlls/ntdll/signal_i386.c
+++ b/dlls/ntdll/signal_i386.c
@@ -2504,16 +2504,10 @@ NTSTATUS signal_alloc_thread( TEB **teb )
  */
 void signal_free_thread( TEB *teb )
 {
-    SIZE_T size;
+    SIZE_T size = 0;
     struct x86_thread_data *thread_data = (struct x86_thread_data *)teb->SystemReserved2;
 
-    if (thread_data) wine_ldt_free_fs( thread_data->fs );
-    if (teb->DeallocationStack)
-    {
-        size = 0;
-        NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
-    }
-    size = 0;
+    wine_ldt_free_fs( thread_data->fs );
     NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
 }
 
diff --git a/dlls/ntdll/signal_powerpc.c b/dlls/ntdll/signal_powerpc.c
index e5a009c2aa2..2d3bd0a2b6b 100644
--- a/dlls/ntdll/signal_powerpc.c
+++ b/dlls/ntdll/signal_powerpc.c
@@ -1023,14 +1023,8 @@ NTSTATUS signal_alloc_thread( TEB **teb )
  */
 void signal_free_thread( TEB *teb )
 {
-    SIZE_T size;
+    SIZE_T size = 0;
 
-    if (teb->DeallocationStack)
-    {
-        size = 0;
-        NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
-    }
-    size = 0;
     NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
 }
 
diff --git a/dlls/ntdll/signal_x86_64.c b/dlls/ntdll/signal_x86_64.c
index 691ee1ffdbf..a052a4824e8 100644
--- a/dlls/ntdll/signal_x86_64.c
+++ b/dlls/ntdll/signal_x86_64.c
@@ -2983,14 +2983,8 @@ NTSTATUS signal_alloc_thread( TEB **teb )
  */
 void signal_free_thread( TEB *teb )
 {
-    SIZE_T size;
+    SIZE_T size = 0;
 
-    if (teb->DeallocationStack)
-    {
-        size = 0;
-        NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
-    }
-    size = 0;
     NtFreeVirtualMemory( NtCurrentProcess(), (void **)&teb, &size, MEM_RELEASE );
 }
 
diff --git a/dlls/ntdll/thread.c b/dlls/ntdll/thread.c
index 511fd94c9ba..9c7cd137312 100644
--- a/dlls/ntdll/thread.c
+++ b/dlls/ntdll/thread.c
@@ -403,6 +403,22 @@ HANDLE thread_init(void)
 }
 
 
+/***********************************************************************
+ *           free_thread_data
+ */
+static void free_thread_data( TEB *teb )
+{
+    SIZE_T size;
+
+    if (teb->DeallocationStack)
+    {
+        size = 0;
+        NtFreeVirtualMemory( GetCurrentProcess(), &teb->DeallocationStack, &size, MEM_RELEASE );
+    }
+    signal_free_thread( teb );
+}
+
+
 /***********************************************************************
  *           terminate_thread
  */
@@ -456,7 +472,7 @@ void exit_thread( int status )
         if (thread_data->pthread_id)
         {
             pthread_join( thread_data->pthread_id, NULL );
-            signal_free_thread( teb );
+            free_thread_data( teb );
         }
     }
 
@@ -634,7 +650,7 @@ NTSTATUS WINAPI RtlCreateUserThread( HANDLE process, const SECURITY_DESCRIPTOR *
     return STATUS_SUCCESS;
 
 error:
-    if (teb) signal_free_thread( teb );
+    if (teb) free_thread_data( teb );
     if (handle) NtClose( handle );
     pthread_sigmask( SIG_SETMASK, &sigset, NULL );
     close( request_pipe[1] );