diff --git a/tools/testing/selftests/arm64/signal/testcases/zt_regs.c b/tools/testing/selftests/arm64/signal/testcases/zt_regs.c
index e1eb4d5c027ab..2e384d731618b 100644
--- a/tools/testing/selftests/arm64/signal/testcases/zt_regs.c
+++ b/tools/testing/selftests/arm64/signal/testcases/zt_regs.c
@@ -65,6 +65,7 @@ int zt_regs_run(struct tdescr *td, siginfo_t *si, ucontext_t *uc)
 	if (memcmp(zeros, (char *)zt + ZT_SIG_REGS_OFFSET,
 		   ZT_SIG_REGS_SIZE(zt->nregs)) != 0) {
 		fprintf(stderr, "ZT data invalid\n");
+		free(zeros);
 		return 1;
 	}