Index: sys/riscv/riscv/trap.c
===================================================================
--- sys/riscv/riscv/trap.c
+++ sys/riscv/riscv/trap.c
@@ -324,6 +324,7 @@
 		riscv_cpu_intr(frame);
 		return;
 	}
+	intr_enable();
 
 	CTR3(KTR_TRAP, "do_trap_user: curthread: %p, sepc: %lx, frame: %p",
 	    curthread, frame->tf_sepc, frame);