diff --git a/src_features/signTx/logic_signTx.c b/src_features/signTx/logic_signTx.c
index 1814e03..4cc9faf 100644
--- a/src_features/signTx/logic_signTx.c
+++ b/src_features/signTx/logic_signTx.c
@@ -72,6 +72,9 @@ customStatus_e customProcessor(txContext_t *context) {
               blockSize = 4;
           }
           else {
+              if (!N_storage.contractDetails) {
+                return CUSTOM_NOT_HANDLED;
+              }                 
               blockSize = 32 - (dataContext.tokenContext.fieldOffset % 32);
           }