diff --git a/src/oracle/pricing_record.cpp b/src/oracle/pricing_record.cpp
index a19c6c8..2cb6830 100644
--- a/src/oracle/pricing_record.cpp
+++ b/src/oracle/pricing_record.cpp
@@ -33,6 +33,9 @@
 #include "storages/portable_storage.h"
 
 #include "string_tools.h"
+
+#define COIN                                            ((uint64_t)1000000000000) // pow(10, 12)
+
 namespace oracle
 {