diff --git a/src/abieos.cpp b/src/abieos.cpp
index 037667b..f3ab403 100644
--- a/src/abieos.cpp
+++ b/src/abieos.cpp
@@ -111,7 +111,9 @@ extern "C" abieos_bool abieos_set_abi(abieos_context* context, uint64_t contract
             return set_error(context, std::move(error));
         abieos::abi c;
         convert(def, c);
-        context->contracts.insert({name{contract}, std::move(c)});
+        const name key {contract};
+        context->contracts.erase(key);
+        context->contracts.insert({key, std::move(c)});
         return true;
     });
 }
@@ -132,7 +134,9 @@ extern "C" abieos_bool abieos_set_abi_bin(abieos_context* context, uint64_t cont
         from_bin(def, stream);
         abieos::abi c;
         convert(def, c);
-        context->contracts.insert({name{contract}, std::move(c)});
+        const name key {contract};
+        context->contracts.erase(key);
+        context->contracts.insert({key, std::move(c)});
         return true;
     });
 }