diff --git a/dlls/tapi32/assisted.c b/dlls/tapi32/assisted.c
index 66ccf5e8c4b..6b4ed02cb5d 100644
--- a/dlls/tapi32/assisted.c
+++ b/dlls/tapi32/assisted.c
@@ -22,7 +22,9 @@
 #include <stdio.h>
 #include "windef.h"
 #include "winbase.h"
+#include "wingdi.h"
 #include "winreg.h"
+#include "objbase.h"
 #include "tapi.h"
 #include "wine/debug.h"
 
diff --git a/dlls/tapi32/line.c b/dlls/tapi32/line.c
index 16b4cbad69d..19f8d0af003 100644
--- a/dlls/tapi32/line.c
+++ b/dlls/tapi32/line.c
@@ -24,9 +24,11 @@
 #include <stdio.h>
 #include "windef.h"
 #include "winbase.h"
+#include "wingdi.h"
 #include "winreg.h"
 #include "winnls.h"
 #include "winerror.h"
+#include "objbase.h"
 #include "tapi.h"
 #include "wine/debug.h"
 
diff --git a/dlls/tapi32/phone.c b/dlls/tapi32/phone.c
index 89e44e92d87..994d787be70 100644
--- a/dlls/tapi32/phone.c
+++ b/dlls/tapi32/phone.c
@@ -22,6 +22,7 @@
 
 #include "windef.h"
 #include "winbase.h"
+#include "objbase.h"
 #include "tapi.h"
 #include "wine/debug.h"
 
diff --git a/include/tapi.h b/include/tapi.h
index 74a2b6e7da1..867366502b9 100644
--- a/include/tapi.h
+++ b/include/tapi.h
@@ -21,6 +21,12 @@
 #ifndef __WINE_TAPI_H
 #define __WINE_TAPI_H
 
+#ifndef __WINESRC__
+# include <windows.h>
+#endif
+#include <basetsd.h>
+#include <oaidl.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif /* defined(__cplusplus) */