diff --git a/simd_c/reedsolomon.h b/simd_c/reedsolomon.h
index b28c586..4bd9ec0 100644
--- a/simd_c/reedsolomon.h
+++ b/simd_c/reedsolomon.h
@@ -21,7 +21,6 @@
  * SOFTWARE
  */
 
-#include <unistd.h>
 #include <stdint.h>
 
 #if HAVE_CONFIG_H
@@ -37,7 +36,6 @@
         const size_t len
 #define PROTO(name)                     \
         PROTO_RETURN                    \
-        __attribute__((nonnull))        \
         name (PROTO_ARGS)
 
 PROTO(reedsolomon_gal_mul);