diff --git a/src/cortexm.c b/src/cortexm.c
index 11423943..8c2e54ed 100644
--- a/src/cortexm.c
+++ b/src/cortexm.c
@@ -693,6 +693,8 @@ static int cortexm_fault_unwind(struct target_s *target)
 		/* Read stack for pre-exception registers */
 		uint32_t sp = spsel ? regs[REG_PSP] : regs[REG_MSP];
 		target_mem_read_words(target, stack, sp, sizeof(stack));
+		if (target_check_error(target))
+			return 0;
 		regs[REG_LR] = stack[5];	/* restore LR to pre-exception state */
 		regs[REG_PC] = stack[6];	/* restore PC to pre-exception state */