diff --git a/drivers/acpi/acpica/acapps.h b/drivers/acpi/acpica/acapps.h
index c32bbe4f5b08..b65f2731e9e2 100644
--- a/drivers/acpi/acpica/acapps.h
+++ b/drivers/acpi/acpica/acapps.h
@@ -54,23 +54,23 @@
 #define ACPICA_COPYRIGHT            "Copyright (c) 2000 - 2017 Intel Corporation"
 
 #if ACPI_MACHINE_WIDTH == 64
-#define ACPI_WIDTH          "-64"
+#define ACPI_WIDTH          " (64-bit version)"
 
 #elif ACPI_MACHINE_WIDTH == 32
-#define ACPI_WIDTH          "-32"
+#define ACPI_WIDTH          " (32-bit version)"
 
 #else
 #error unknown ACPI_MACHINE_WIDTH
-#define ACPI_WIDTH          "-??"
+#define ACPI_WIDTH          " (unknown bit width, not 32 or 64)"
 
 #endif
 
 /* Macros for signons and file headers */
 
 #define ACPI_COMMON_SIGNON(utility_name) \
-	"\n%s\n%s version %8.8X%s\n%s\n\n", \
+	"\n%s\n%s version %8.8X\n%s\n\n", \
 	ACPICA_NAME, \
-	utility_name, ((u32) ACPI_CA_VERSION), ACPI_WIDTH, \
+	utility_name, ((u32) ACPI_CA_VERSION), \
 	ACPICA_COPYRIGHT
 
 #define ACPI_COMMON_HEADER(utility_name, prefix) \