diff --git a/event/dispatch_proc.h b/event/dispatch_proc.h
index 15ef19a..be18d0d 100644
--- a/event/dispatch_proc.h
+++ b/event/dispatch_proc.h
@@ -181,6 +181,9 @@ void dispatch_proc_end(iohook_event * const event) {
 				if (strcmp(cevent, "mright") == 0) {
 					amouse = 2;
 				}
+				if (strcmp(cevent, "center") == 0) {
+					amouse = 3;
+				}
 				if (strcmp(cevent, "wheelDown") == 0) {
 					amouse = 4;
 				}
diff --git a/extern.go b/extern.go
index 6cacb4c..b1d0aff 100644
--- a/extern.go
+++ b/extern.go
@@ -5,6 +5,7 @@ package hook
 // #include "event/hook_async.h"
 */
 import "C"
+
 import (
 	"log"
 	"time"