diff --git a/ext/rpc/com/COM.c b/ext/rpc/com/COM.c
index 9fc392a6976..c726b700d01 100644
--- a/ext/rpc/com/COM.c
+++ b/ext/rpc/com/COM.c
@@ -38,7 +38,7 @@
 #define _WIN32_DCOM
 
 #include "php.h"
-#include "php3_COM.h"
+#include "php_COM.h"
 #include "zend_compile.h"
 #include "php_ini.h"
 
diff --git a/main/internal_functions_win32.c b/main/internal_functions_win32.c
index 92b2c215aef..389b50714e9 100644
--- a/main/internal_functions_win32.c
+++ b/main/internal_functions_win32.c
@@ -45,7 +45,7 @@
 #include "ext/standard/php3_syslog.h"
 #include "ext/standard/php3_standard.h"
 #include "ext/standard/php_lcg.h"
-#include "ext/COM/php3_COM.h"
+#include "ext/COM/php_COM.h"
 #include "ext/standard/reg.h"
 #include "ext/pcre/php_pcre.h"
 #include "ext/odbc/php_odbc.h"
diff --git a/php4dllts.dsp b/php4dllts.dsp
index f3fba74bd54..85f492f7f4b 100644
--- a/php4dllts.dsp
+++ b/php4dllts.dsp
@@ -729,7 +729,7 @@ SOURCE=.\win32\param.h
 # End Source File
 # Begin Source File
 
-SOURCE=.\ext\com\php3_COM.h
+SOURCE=.\ext\com\php_COM.h
 # End Source File
 # Begin Source File