diff --git a/src/app/server/java/BUILD.gn b/src/app/server/java/BUILD.gn
index 905257607e7178..fa3a49f8be2737 100644
--- a/src/app/server/java/BUILD.gn
+++ b/src/app/server/java/BUILD.gn
@@ -43,6 +43,8 @@ static_library("jni") {
   ]
 
   public_configs = [ "${chip_root}/src:includes" ]
+
+  cflags = [ "-Wconversion" ]
 }
 
 android_library("java") {
diff --git a/src/app/server/java/ChipFabricProvider-JNI.cpp b/src/app/server/java/ChipFabricProvider-JNI.cpp
index ae7aac3ce75af0..8fea4d4c9ba47b 100644
--- a/src/app/server/java/ChipFabricProvider-JNI.cpp
+++ b/src/app/server/java/ChipFabricProvider-JNI.cpp
@@ -99,7 +99,7 @@ CHIP_ERROR ReadFabricList(JNIEnv * env, jobject & self)
         VerifyOrExit(jlabel != nullptr, err = CHIP_JNI_ERROR_FIELD_NOT_FOUND);
 
         env->SetIntField(jFabric, jvendorId, fabricInfo.GetVendorId());
-        env->SetLongField(jFabric, jnodeId, fabricInfo.GetNodeId());
+        env->SetLongField(jFabric, jnodeId, static_cast<jlong>(fabricInfo.GetNodeId()));
         env->SetShortField(jFabric, jfabricIndex, fabricInfo.GetFabricIndex());
         UtfString jLabelStr(env, fabricInfo.GetFabricLabel());
         env->SetObjectField(jFabric, jlabel, jLabelStr.jniValue());