diff --git a/src/config/param.linux22.h b/src/config/param.linux22.h
index c6f0e614d3..d6b4a7826a 100644
--- a/src/config/param.linux22.h
+++ b/src/config/param.linux22.h
@@ -88,7 +88,6 @@
 #define AFS_GCPAGS		0	/* if nonzero, garbage collect PAGs */
 #define AFS_HAVE_FFS		1	/* Use system's ffs. */
 #define AFS_HAVE_STATVFS	0	/* System doesn't support statvfs */
-#define AFS_VM_RDWR_ENV		1	/* read/write implemented via VM */
 
 #define	afsio_iov	uio_iov
 #define	afsio_iovcnt	uio_iovcnt
diff --git a/src/config/param.linux24.h b/src/config/param.linux24.h
index 802a7cfca4..9d4334fdfa 100644
--- a/src/config/param.linux24.h
+++ b/src/config/param.linux24.h
@@ -92,7 +92,6 @@
 #define AFS_GCPAGS		0	/* if nonzero, garbage collect PAGs */
 #define AFS_HAVE_FFS		1	/* Use system's ffs. */
 #define AFS_HAVE_STATVFS	0	/* System doesn't support statvfs */
-#define AFS_VM_RDWR_ENV		1	/* read/write implemented via VM */
 
 #define	afsio_iov	uio_iov
 #define	afsio_iovcnt	uio_iovcnt
diff --git a/src/config/param.linux26.h b/src/config/param.linux26.h
index ad2536be16..4e192b8bca 100644
--- a/src/config/param.linux26.h
+++ b/src/config/param.linux26.h
@@ -75,7 +75,6 @@
 #define AFS_GCPAGS		0	/* if nonzero, garbage collect PAGs */
 #define AFS_HAVE_FFS		1	/* Use system's ffs. */
 #define AFS_HAVE_STATVFS	0	/* System doesn't support statvfs */
-#define AFS_VM_RDWR_ENV		1	/* read/write implemented via VM */
 
 #define	afsio_iov	uio_iov
 #define	afsio_iovcnt	uio_iovcnt