1 files changed, 2 insertions, 1 deletions
diff --git a/ratio.h b/ratio.h
index e555cfb..884681d 100644
--- a/ratio.h
+++ b/ratio.h
@@ -27,9 +27,10 @@ rational absolute(rational);
 
 rational power(rational,unsigned int);
 
-
 double valuetype_to_double(rational);
 
+double inv_exptype_to_double(int);
+
 int to_string(char*,rational r);
 
 int root_to_string(char*,rational r,unsigned int);