diff --git a/src/FBX2glTF.cpp b/src/FBX2glTF.cpp
index dc480b2..3233a29 100644
--- a/src/FBX2glTF.cpp
+++ b/src/FBX2glTF.cpp
@@ -399,7 +399,7 @@ int main(int argc, char* argv[]) {
 
   assert(!outputFolder.empty());
 
-  const std::string binaryPath = outputFolder + extBufferFilename;
+  const std::string binaryPath = outputFolder + FileUtils::GetFileBase(gltfOptions.inputPath) + extBufferFilename;
   FILE* fp = fopen(binaryPath.c_str(), "wb");
   if (fp == nullptr) {
     fmt::fprintf(stderr, "ERROR:: Couldn't open file '%s' for writing.\n", binaryPath);
diff --git a/src/gltf/GltfModel.hpp b/src/gltf/GltfModel.hpp
index 0c4f40e..bd8cf40 100644
--- a/src/gltf/GltfModel.hpp
+++ b/src/gltf/GltfModel.hpp
@@ -230,6 +230,6 @@ class GltfModel {
   }
   BufferData* buildDefaultBuffer(const GltfOptions& options) {
     return options.outputBinary ? new BufferData(binary)
-                                : new BufferData(extBufferFilename, binary, options.embedResources);
+                                : new BufferData(FileUtils::GetFileBase(options.inputPath) + extBufferFilename, binary, options.embedResources);
   }
 };