1 files changed, 2 insertions, 0 deletions
diff --git a/libgloss/arm/ftruncate.c b/libgloss/arm/ftruncate.c
index da46fc5d7..41a64d2ae 100644
--- a/libgloss/arm/ftruncate.c
+++ b/libgloss/arm/ftruncate.c
@@ -23,10 +23,12 @@
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
 
+#include <errno.h>
 #include <sys/types.h>
 
 int
 ftruncate (int file, off_t length)
 {
+  errno = ENOSYS;
   return -1;
 }