diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 71b45c58218b..39fc69873b18 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -63,7 +63,7 @@ EXPORT_SYMBOL(vmemmap);
  * bit addressable memory area.
  */
 phys_addr_t arm64_dma_phys_limit __ro_after_init;
-phys_addr_t arm64_dma32_phys_limit __ro_after_init;
+static phys_addr_t arm64_dma32_phys_limit __ro_after_init;
 
 #ifdef CONFIG_KEXEC_CORE
 /*