diff --git a/headers/os/interface/InterfaceDefs.h b/headers/os/interface/InterfaceDefs.h
index f09e78c86b..162fc00740 100644
--- a/headers/os/interface/InterfaceDefs.h
+++ b/headers/os/interface/InterfaceDefs.h
@@ -64,8 +64,9 @@ enum {
 
 	B_FUNCTION_KEY		= 0x10,
 
+	// for Japanese keyboards
 	B_KATAKANA_HIRAGANA	= 0xf2,
-	B_ZENKAKU_HANKAKU	= 0xf3
+	B_HANKAKU_ZENKAKU	= 0xf3
 };
 
 enum {
diff --git a/src/servers/input/InputServer.cpp b/src/servers/input/InputServer.cpp
index 348a503775..8c791dee70 100644
--- a/src/servers/input/InputServer.cpp
+++ b/src/servers/input/InputServer.cpp
@@ -1504,7 +1504,7 @@ InputServer::_UpdateMouseAndKeys(EventList& events)
 					byte = 0;
 
 				if (((fKeyInfo.modifiers & B_COMMAND_KEY) != 0 && byte == ' ')
-					|| byte == B_ZENKAKU_HANKAKU) {
+					|| byte == B_HANKAKU_ZENKAKU) {
 					SetNextMethod(!(fKeyInfo.modifiers & B_SHIFT_KEY));
 
 					// this event isn't sent to the user