diff --git a/server/context_i386.c b/server/context_i386.c
index 4ef2fa50e28..bae5ff8bbfd 100644
--- a/server/context_i386.c
+++ b/server/context_i386.c
@@ -37,7 +37,6 @@
 #endif
 
 #include "windef.h"
-#include "winbase.h"
 
 #include "file.h"
 #include "thread.h"
diff --git a/server/context_powerpc.c b/server/context_powerpc.c
index 96d81e2d97f..8749091f1c7 100644
--- a/server/context_powerpc.c
+++ b/server/context_powerpc.c
@@ -47,7 +47,6 @@
 #endif /* PTRACE_POKEUSER */
 
 #include "windef.h"
-#include "winbase.h"
 
 #include "file.h"
 #include "thread.h"
diff --git a/server/context_sparc.c b/server/context_sparc.c
index 157f02b6d5e..8598114a7af 100644
--- a/server/context_sparc.c
+++ b/server/context_sparc.c
@@ -35,7 +35,6 @@
 #endif
 
 #include "windef.h"
-#include "winbase.h"
 
 #include "file.h"
 #include "thread.h"
diff --git a/server/debugger.c b/server/debugger.c
index e8fbb0c47f3..28781ad0761 100644
--- a/server/debugger.c
+++ b/server/debugger.c
@@ -28,7 +28,6 @@
 #include <stdio.h>
 
 #include "windef.h"
-#include "winbase.h"
 
 #include "handle.h"
 #include "process.h"
diff --git a/server/fd.c b/server/fd.c
index afd1ddb1942..2d31d52c3d5 100644
--- a/server/fd.c
+++ b/server/fd.c
@@ -50,7 +50,6 @@
 #include "process.h"
 #include "request.h"
 
-#include "winbase.h"
 #include "winternl.h"
 
 #if defined(HAVE_SYS_EPOLL_H) && defined(HAVE_EPOLL_CREATE)
diff --git a/server/file.c b/server/file.c
index 0076f514c43..f73196a4d2f 100644
--- a/server/file.c
+++ b/server/file.c
@@ -44,7 +44,6 @@
 #endif
 
 #include "windef.h"
-#include "winbase.h"
 #include "winternl.h"
 
 #include "file.h"
diff --git a/server/handle.c b/server/handle.c
index 802e07df1ef..287efc2d409 100644
--- a/server/handle.c
+++ b/server/handle.c
@@ -29,7 +29,6 @@
 #include <stdlib.h>
 
 #include "windef.h"
-#include "winbase.h"
 
 #include "handle.h"
 #include "process.h"
diff --git a/server/mailslot.c b/server/mailslot.c
index c4e46eb44ce..69b9feaf7bc 100644
--- a/server/mailslot.c
+++ b/server/mailslot.c
@@ -43,7 +43,6 @@
 #include <sys/filio.h>
 #endif
 #include "windef.h"
-#include "winbase.h"
 
 #include "file.h"
 #include "handle.h"
diff --git a/server/mapping.c b/server/mapping.c
index 886edc62ab3..400006b89e9 100644
--- a/server/mapping.c
+++ b/server/mapping.c
@@ -29,7 +29,6 @@
 #include <unistd.h>
 
 #include "windef.h"
-#include "winbase.h"
 
 #include "file.h"
 #include "handle.h"
diff --git a/server/named_pipe.c b/server/named_pipe.c
index a1d2c7d7494..cd9d0d6b0f0 100644
--- a/server/named_pipe.c
+++ b/server/named_pipe.c
@@ -43,7 +43,6 @@
 #endif
 
 #include "windef.h"
-#include "winbase.h"
 #include "winternl.h"
 
 #include "file.h"
diff --git a/server/process.c b/server/process.c
index 279901c15ee..37ab40c4cae 100644
--- a/server/process.c
+++ b/server/process.c
@@ -38,7 +38,6 @@
 #endif
 
 #include "windef.h"
-#include "winbase.h"
 #include "winnt.h"
 
 #include "file.h"
diff --git a/server/registry.c b/server/registry.c
index 6c56f67e705..f852d08809e 100644
--- a/server/registry.c
+++ b/server/registry.c
@@ -46,7 +46,6 @@
 #include "unicode.h"
 #include "security.h"
 
-#include "winbase.h"
 #include "winternl.h"
 #include "wine/library.h"
 
diff --git a/server/serial.c b/server/serial.c
index ae44083ef3d..e2763dc3a59 100644
--- a/server/serial.c
+++ b/server/serial.c
@@ -47,7 +47,6 @@
 #endif
 
 #include "windef.h"
-#include "winbase.h"
 #include "winternl.h"
 
 #include "file.h"
diff --git a/server/sock.c b/server/sock.c
index 535786e87a7..4f164a750c6 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -48,7 +48,6 @@
 #include <unistd.h>
 
 #include "windef.h"
-#include "winbase.h"
 
 #include "process.h"
 #include "file.h"
diff --git a/server/thread.c b/server/thread.c
index c11c18ab54e..819fd9f78ba 100644
--- a/server/thread.c
+++ b/server/thread.c
@@ -37,7 +37,6 @@
 #endif
 
 #include "windef.h"
-#include "winbase.h"
 
 #include "file.h"
 #include "handle.h"