diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index 2eaf07fb5f..31ac4b15c3 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -320,6 +320,7 @@ static int decode_ste(SMMUv3State *s, SMMUTransCfg *cfg,
     uint32_t config;
 
     if (!STE_VALID(ste)) {
+        qemu_log_mask(LOG_GUEST_ERROR, "invalid STE\n");
         goto bad_ste;
     }