c3-lang/libmd

diff --git a/configure.ac b/configure.ac
index 330e8cb..16dcc53 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,7 +31,7 @@ AC_PROG_CC
 # Checks for libraries.
 
 # Checks for header files.
-AC_CHECK_HEADERS([sys/param.h])
+AC_CHECK_HEADERS([sys/param.h sys/endian.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_TYPE_OFF_T
diff --git a/src/rmd160.c b/src/rmd160.c
index a2e8deb..9bfc348 100644
--- a/src/rmd160.c
+++ b/src/rmd160.c
@@ -28,7 +28,11 @@
  */
 #include <string.h>
 #include <sys/types.h>
+#ifdef HAVE_SYS_ENDIAN_H
 #include <sys/endian.h>
+#else
+#include <endian.h>
+#endif
 #include <rmd160.h>
 
 #define PUT_64BIT_LE(cp, value) do {                                    \