1 files changed, 1 insertions, 1 deletions
diff --git a/c67-gen.c b/c67-gen.c
index 04f8a12..a60b6bf 100644
--- a/c67-gen.c
+++ b/c67-gen.c
@@ -85,7 +85,7 @@ enum {
     TREG_C67_B13,
 };
 
-int reg_classes[NB_REGS] = {
+const int reg_classes[NB_REGS] = {
 						/* eax */ RC_INT | RC_FLOAT | RC_EAX,
 						// only allow even regs for floats (allow for doubles)
     /* ecx */ RC_INT | RC_ECX,