diff --git a/sysdeps/unix/bsd/m68k/sysdep.S b/sysdeps/unix/bsd/m68k/sysdep.S
index a6b3c99557..fccc605d7f 100644
--- a/sysdeps/unix/bsd/m68k/sysdep.S
+++ b/sysdeps/unix/bsd/m68k/sysdep.S
@@ -16,13 +16,28 @@ License along with the GNU C Library; see the file COPYING.LIB.  If
 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
+#include <errnos.h>
+
 .globl syscall_error
 syscall_error:
+	/* We translate the system's EWOULDBLOCK error into EAGAIN.
+	   The GNU C library always defines EWOULDBLOCK==EAGAIN.
+	   EWOULDBLOCK_sys is the original number.  */
 #ifdef __motorola__
-	move.l d0, _errno
+#ifdef EWOULDBLOCK_sys
+	cmp.l d0, #EWOULDBLOCK_sys
+	bne store
+	moveq.l #EAGAIN, d0
+#endif
+store:	move.l d0, _errno
 	moveq.l #-1, d0
 #else
-	movel d0, _errno
+#ifdef EWOULDBLOCK_sys
+	cmpl d0, #EWOULDBLOCK_sys
+	bne 0f
+	moveq #EAGAIN, d0
+#endif
+0:	movel d0, _errno
 	moveq #-1, d0
 #endif
 	rts