diff --git a/share/sysdefs/syscall.h b/share/sysdefs/syscall.h
index 7b7e936..c667921 100644
--- a/share/sysdefs/syscall.h
+++ b/share/sysdefs/syscall.h
@@ -2,7 +2,6 @@
 #define SHARE_HDRS_SYSCALL_H_
 
 #define SYS_DEBUGPRINT 1
-#define SYS_IOCTL      3
 #define SYS_MMAN_MAP   5
 #define SYS_MMAN_UNMAP 6
 #define SYS_SCHEDRELEASE 7