diff --git a/hw/petalogix_s3adsp1800_mmu.c b/hw/petalogix_s3adsp1800_mmu.c
index e62b8ec20e..bda08c561a 100644
--- a/hw/petalogix_s3adsp1800_mmu.c
+++ b/hw/petalogix_s3adsp1800_mmu.c
@@ -38,7 +38,7 @@
 #define LMB_BRAM_SIZE  (128 * 1024)
 #define FLASH_SIZE     (16 * 1024 * 1024)
 
-struct
+static struct
 {
     uint32_t bootstrap_pc;
     uint32_t cmdline;