diff --git a/c_src/driver_comm.h b/c_src/driver_comm.h
index 9f04d16..0b3bd97 100644
--- a/c_src/driver_comm.h
+++ b/c_src/driver_comm.h
@@ -13,8 +13,6 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#include "erl_compatibility.h"
-
 #ifndef __DRIVER_COMM__
 #define __DRIVER_COMM__
 
diff --git a/c_src/erl_compatibility.h b/c_src/erl_compatibility.h
deleted file mode 100644
index 14a499d..0000000
--- a/c_src/erl_compatibility.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
-   Copyright (c) 2012 Basho Technologies, Inc.
-
-   This file is provided to you under the Apache License,
-   Version 2.0 (the "License"); you may not use this file
-   except in compliance with the License.  You may obtain
-   a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing,
-   software distributed under the License is distributed on an
-   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-   KIND, either express or implied.  See the License for the
-   specific language governing permissions and limitations
-   under the License.
-
-*/
-
-#ifndef __ERL_COMPATIBILITY_H__
-#define __ERL_COMPATIBILITY_H__
-
-/* For compatibility with OTP releases prior to R15.
-   R15 and greater uses ErlDrvSizeT as an unsigned size
-   like size_t for driver_* calls
-*/
-#if ERL_DRV_EXTENDED_MAJOR_VERSION < 2
-#define ErlDrvSizeT size_t
-#define ErlDrvSSizeT ssize_t
-#endif
-
-
-#endif /* __ERL_COMPATIBILITY_H__ */
diff --git a/c_src/spidermonkey.c b/c_src/spidermonkey.c
index 623c109..02d52bd 100644
--- a/c_src/spidermonkey.c
+++ b/c_src/spidermonkey.c
@@ -21,7 +21,6 @@
 
 #include "driver_comm.h"
 #include "spidermonkey.h"
-#include "erl_compatibility.h"
 
 void free_error(spidermonkey_state *state);
 
diff --git a/c_src/spidermonkey_drv.c b/c_src/spidermonkey_drv.c
index 5e09dba..4106d39 100644
--- a/c_src/spidermonkey_drv.c
+++ b/c_src/spidermonkey_drv.c
@@ -21,7 +21,6 @@
 #include "spidermonkey.h"
 #include "config.h"
 #include "driver_comm.h"
-#include "erl_compatibility.h"
 
 typedef struct _spidermonkey_drv_t {
   ErlDrvPort port;