diff --git a/unicode/c_878.c b/unicode/c_878.c
index 905b16d..c0dfc98 100644
--- a/unicode/c_878.c
+++ b/unicode/c_878.c
@@ -4,7 +4,7 @@
 
 #include "wine/unicode.h"
 
-static const unsigned short cp2uni[256] =
+static const WCHAR cp2uni[256] =
 {
     0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
     0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,