diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index 221c865785c2..a85e0c3e7027 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -60,7 +60,7 @@ typedef struct {
 	 * except of floats, and long long (32 bit)
 	 *
 	 */
-	long args[0];
+	long args[];
 } debug_sprintf_entry_t;
 
 /* internal function prototyes */