diff --git a/packages/react-native-nitro-image/android/src/main/java/com/margelo/nitro/image/KotlinTestObject.kt b/packages/react-native-nitro-image/android/src/main/java/com/margelo/nitro/image/KotlinTestObject.kt
index 2e69f19d8..dbc571d32 100644
--- a/packages/react-native-nitro-image/android/src/main/java/com/margelo/nitro/image/KotlinTestObject.kt
+++ b/packages/react-native-nitro-image/android/src/main/java/com/margelo/nitro/image/KotlinTestObject.kt
@@ -39,8 +39,8 @@ class KotlinTestObject: HybridKotlinTestObjectSpec() {
         map.setString("string", "String!")
         map.setBoolean("bool", true)
         map.setBigInt("bigint", 893256789)
-        map.setAnyObject("object", mapOf("first" to 1, "second" to "string", "third" to mapOf("nested" to true)))
-        map.setAnyArray("array", arrayOf(11, true, 33.5, "string", arrayOf("nested", true)))
+        map.setAnyObject("object", mapOf("first" to 1.0, "second" to "string", "third" to mapOf("nested" to true)))
+        map.setAnyArray("array", arrayOf(11.0, true, 33.5, "string", arrayOf("nested", true)))
         return map
     }
 
diff --git a/packages/react-native-nitro-modules/android/src/main/cpp/jsi/JSIConverter+JObject.hpp b/packages/react-native-nitro-modules/android/src/main/cpp/jsi/JSIConverter+JObject.hpp
index 58ab74b29..1c6397261 100644
--- a/packages/react-native-nitro-modules/android/src/main/cpp/jsi/JSIConverter+JObject.hpp
+++ b/packages/react-native-nitro-modules/android/src/main/cpp/jsi/JSIConverter+JObject.hpp
@@ -46,7 +46,13 @@ struct JSIConverter<jni::JObject> final {
       return JSIConverter<jni::JMap<jni::JString, jni::JObject>>::toJSI(
           runtime, jni::static_ref_cast<jni::JMap<jni::JString, jni::JObject>>(boxedValue));
     } else [[unlikely]] {
-      throw std::runtime_error("Cannot convert \"" + boxedValue->toString() + "\" to jsi::Value!");
+      // It's an unknown type! Let's give the developer some hints..
+      if (boxedValue->isInstanceOf(jni::JInteger::javaClassStatic())) {
+        throw std::runtime_error("Cannot convert Integer \"" + boxedValue->toString() +
+                                 "\" to jsi::Value! JavaScript uses Doubles for numbers.");
+      } else {
+        throw std::runtime_error("Cannot convert \"" + boxedValue->toString() + "\" to jsi::Value!");
+      }
     }
   }
   static inline jni::local_ref<jni::JObject> fromJSI(jsi::Runtime& runtime, const jsi::Value& value) {