diff --git a/lib/c/2006/labcomm2006_ioctl.h b/lib/c/2006/labcomm2006_ioctl.h
index 22794babca46cf928d0b4b03bcc72a6913cd61ab..47b48dd0bf55cafb8a46837069e630967055af63 100644
--- a/lib/c/2006/labcomm2006_ioctl.h
+++ b/lib/c/2006/labcomm2006_ioctl.h
@@ -84,23 +84,14 @@
   LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_NONE,type,nr,0)
 #define LABCOMM_IOR(type,nr,size)					\
   LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_READ,type,nr,sizeof(size))
-/* FIXME: add flag to differentiate between size and nargs */
-#define LABCOMM_IORN(type,nr,nargs)					\
-  LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_READ,type,nr,nargs)
 #define LABCOMM_IOW(type,nr,size)					\
   LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_WRITE,type,nr,sizeof(size))
-#define LABCOMM_IOWN(type,nr,nargs)					\
-  LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_WRITE,type,nr,nargs)
 #define LABCOMM_IOS(type,nr)					\
   LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_READ,type,nr,0)
 #define LABCOMM_IOSR(type,nr,size)					\
   LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_READ,type,nr,sizeof(size))
-#define LABCOMM_IOSRN(type,nr,nargs)					\
-  LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_READ,type,nr,nargs)
 #define LABCOMM_IOSW(type,nr,size)					\
   LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_WRITE,type,nr,sizeof(size))
-#define LABCOMM_IOSWN(type,nr,nargs)					\
-  LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_WRITE,type,nr,nargs)
 
 #define LABCOMM_IOCTL_WRITER_GET_BYTES_WRITTEN \
   LABCOMM_IOR(0,1,int)
diff --git a/lib/c/2014/labcomm_ioctl.h b/lib/c/2014/labcomm_ioctl.h
index 1ebf6531d4000ebfb2392a547eaf1f2a1f589b80..9711eb7d826c9e55603a1310f2555e73486255b0 100644
--- a/lib/c/2014/labcomm_ioctl.h
+++ b/lib/c/2014/labcomm_ioctl.h
@@ -84,23 +84,14 @@
   LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_NONE,type,nr,0)
 #define LABCOMM_IOR(type,nr,size)					\
   LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_READ,type,nr,sizeof(size))
-/* FIXME: add flag to differentiate between size and nargs */
-#define LABCOMM_IORN(type,nr,nargs)					\
-  LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_READ,type,nr,nargs)
 #define LABCOMM_IOW(type,nr,size)					\
   LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_WRITE,type,nr,sizeof(size))
-#define LABCOMM_IOWN(type,nr,nargs)					\
-  LABCOMM_IOC(LABCOMM_IOC_NOSIG,LABCOMM_IOC_WRITE,type,nr,nargs)
-#define LABCOMM_IOS(type,nr)					\
+#define LABCOMM_IOS(type,nr)                                    \
   LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_READ,type,nr,0)
 #define LABCOMM_IOSR(type,nr,size)					\
   LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_READ,type,nr,sizeof(size))
-#define LABCOMM_IOSRN(type,nr,nargs)					\
-  LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_READ,type,nr,nargs)
 #define LABCOMM_IOSW(type,nr,size)					\
   LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_WRITE,type,nr,sizeof(size))
-#define LABCOMM_IOSWN(type,nr,nargs)					\
-  LABCOMM_IOC(LABCOMM_IOC_USESIG,LABCOMM_IOC_WRITE,type,nr,nargs)
 
 #define LABCOMM_IOCTL_WRITER_GET_BYTES_WRITTEN \
   LABCOMM_IOR(0,1,int)