diff --git a/include/sifive/const.h b/include/sifive/const.h
deleted file mode 100644
index 8dcffbb..0000000
--- a/include/sifive/const.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// See LICENSE for license details.
-/* Derived from <linux/const.h> */
-
-#ifndef _SIFIVE_CONST_H
-#define _SIFIVE_CONST_H
-
-#ifdef __ASSEMBLER__
-#define _AC(X,Y)        X
-#define _AT(T,X)        X
-#else
-#define _AC(X,Y)        (X##Y)
-#define _AT(T,X)        ((T)(X))
-#endif /* !__ASSEMBLER__*/
-
-#define _BITUL(x)       (_AC(1,UL) << (x))
-#define _BITULL(x)      (_AC(1,ULL) << (x))
-
-#endif /* _SIFIVE_CONST_H */
diff --git a/include/sifive/devices/plic.h b/include/sifive/devices/plic.h
index e1ca5d6..9b5a3cf 100644
--- a/include/sifive/devices/plic.h
+++ b/include/sifive/devices/plic.h
@@ -3,7 +3,7 @@
 #ifndef PLIC_H
 #define PLIC_H
 
-#include <sifive/const.h>
+//#include <sifive/const.h>
 
 // 32 bits per source
 #define PLIC_PRIORITY_OFFSET            _AC(0x0000,UL)
diff --git a/include/tgc-vp/const.h b/include/tgc-vp/const.h
deleted file mode 100644
index 3e0a681..0000000
--- a/include/tgc-vp/const.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/* Derived from <linux/const.h> */
-
-#ifndef _SIFIVE_CONST_H
-#define _SIFIVE_CONST_H
-
-#ifdef __ASSEMBLER__
-#define _AC(X,Y)        X
-#define _AT(T,X)        X
-#else
-#define _AC(X,Y)        (X##Y)
-#define _AT(T,X)        ((T)(X))
-#endif /* !__ASSEMBLER__*/
-
-#define _BITUL(x)       (_AC(1,UL) << (x))
-#define _BITULL(x)      (_AC(1,ULL) << (x))
-
-#endif /* _SIFIVE_CONST_H */
diff --git a/include/tgc-vp/devices/plic.h b/include/tgc-vp/devices/plic.h
index 16ea689..03c4aa8 100644
--- a/include/tgc-vp/devices/plic.h
+++ b/include/tgc-vp/devices/plic.h
@@ -3,7 +3,7 @@
 #ifndef PLIC_H
 #define PLIC_H
 
-#include <tgc-vp/const.h>
+//#include <tgc-vp/const.h>
 
 // 32 bits per source
 #define PLIC_PRIORITY_OFFSET            _AC(0x0000,UL)