diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 7a3ad28b86c6..6ee7437537db 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -944,7 +944,7 @@ struct acpi_table_drtm {
 
 struct acpi_drtm_vtable_list {
 	u32 validated_table_count;
-	u64 validated_tables[1];
+	u64 validated_tables[];
 };
 
 /* 2) Resources List (of Resource Descriptors) */
@@ -959,7 +959,7 @@ struct acpi_drtm_resource {
 
 struct acpi_drtm_resource_list {
 	u32 resource_count;
-	struct acpi_drtm_resource resources[1];
+	struct acpi_drtm_resource resources[];
 };
 
 /* 3) Platform-specific Identifiers List */
@@ -982,7 +982,7 @@ struct acpi_table_ecdt {
 	struct acpi_generic_address data;	/* Address of EC data register */
 	u32 uid;		/* Unique ID - must be same as the EC _UID method */
 	u8 gpe;			/* The GPE for the EC */
-	u8 id[1];		/* Full namepath of the EC in the ACPI namespace */
+	u8 id[];		/* Full namepath of the EC in the ACPI namespace */
 };
 
 /*******************************************************************************