diff --git a/exec-all.h b/exec-all.h
index ef783d8d16..93e0b5ddfb 100644
--- a/exec-all.h
+++ b/exec-all.h
@@ -37,7 +37,7 @@ typedef struct TranslationBlock TranslationBlock;
 #define MAX_OP_PER_INSTR 96
 /* A Call op needs up to 6 + 2N parameters (N = number of arguments).  */
 #define MAX_OPC_PARAM 10
-#define OPC_BUF_SIZE 512
+#define OPC_BUF_SIZE 640
 #define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
 
 /* Maximum size a TCG op can expand to.  This is complicated because a