Index: sys/arm/arm/vm_machdep.c
===================================================================
--- sys/arm/arm/vm_machdep.c
+++ sys/arm/arm/vm_machdep.c
@@ -56,6 +56,7 @@
 #include <sys/sysctl.h>
 #include <sys/sysent.h>
 #include <sys/unistd.h>
+#include <sys/errno.h>
 
 #include <machine/cpu.h>
 #include <machine/frame.h>
@@ -193,7 +194,6 @@
 		fixup = (code != SYS_lseek);
 	}
 #endif
-
 	switch (error) {
 	case 0:
 		if (fixup) {
@@ -220,7 +220,7 @@
 		/* nothing to do */
 		break;
 	default:
-		frame->tf_r0 = error;
+		frame->tf_r0 = SV_ABI_ERRNO(td->td_proc, error);
 		frame->tf_spsr |= PSR_C;    /* carry bit */
 		break;
 	}