diff --git a/src/ringct/rctTypes.cpp b/src/ringct/rctTypes.cpp
index 31d4f7812..2b3141912 100644
--- a/src/ringct/rctTypes.cpp
+++ b/src/ringct/rctTypes.cpp
@@ -237,6 +237,18 @@ namespace rct {
         }
     }
 
+    bool is_rct_old_bulletproof(int type)
+    {
+      switch (type)
+        {
+        case RCTTypeSimpleBulletproof:
+        case RCTTypeFullBulletproof:
+          return true;
+        default:
+          return false;
+        }
+    }
+
     bool is_rct_borromean(int type)
     {
         switch (type)
diff --git a/src/ringct/rctTypes.h b/src/ringct/rctTypes.h
index e0c64d8ed..512cdb733 100644
--- a/src/ringct/rctTypes.h
+++ b/src/ringct/rctTypes.h
@@ -554,6 +554,7 @@ namespace rct {
 
     bool is_rct_simple(int type);
     bool is_rct_bulletproof(int type);
+    bool is_rct_old_bulletproof(int type);
     bool is_rct_borromean(int type);
 
     static inline const rct::key &pk2rct(const crypto::public_key &pk) { return (const rct::key&)pk; }