--- scim-hangul-0.4.0/src/scim_hangul_imengine.cpp	2012-08-04 18:15:55.791206974 +0530
+++ scim-hangul-0.4.0/src/scim_hangul_imengine.cpp	2012-08-04 18:16:38.112291222 +0530
@@ -34,6 +34,7 @@
 #endif
 
 #include <cstring>
+#include <unistd.h>
 #include <scim.h>
 #include "scim_hangul_imengine.h"