diff --git a/src/tools.cpp b/src/tools.cpp
index cd5f775..8efed77 100644
--- a/src/tools.cpp
+++ b/src/tools.cpp
@@ -719,22 +719,22 @@ decode_ringct(const rct::rctSig& rv,
               rct::key & mask,
               uint64_t & amount)
 {
-    crypto::key_derivation derivation;
+    try
+    {
+        crypto::key_derivation derivation;
 
-    bool r = crypto::generate_key_derivation(pub, sec, derivation);
+        bool r = crypto::generate_key_derivation(pub, sec, derivation);
 
-    if (!r)
-    {
-        cerr <<"Failed to generate key derivation to decode rct output " << i << endl;
-        return false;
-    }
+        if (!r)
+        {
+            cerr <<"Failed to generate key derivation to decode rct output " << i << endl;
+            return false;
+        }
 
-    crypto::secret_key scalar1;
+        crypto::secret_key scalar1;
 
-    crypto::derivation_to_scalar(derivation, i, scalar1);
+        crypto::derivation_to_scalar(derivation, i, scalar1);
 
-    try
-    {
         switch (rv.type)
         {
             case rct::RCTTypeSimple: