diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index 4cc709d2c6..e24c12d7ee 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -277,7 +277,7 @@ static int megasas_map_sgl(MegasasState *s, MegasasCmd *cmd, union mfi_sgl *sgl)
 
     cmd->flags = le16_to_cpu(cmd->frame->header.flags);
     iov_count = cmd->frame->header.sge_count;
-    if (iov_count > MEGASAS_MAX_SGE) {
+    if (!iov_count || iov_count > MEGASAS_MAX_SGE) {
         trace_megasas_iovec_sgl_overflow(cmd->index, iov_count,
                                          MEGASAS_MAX_SGE);
         return -1;