diff --git a/plugins/builtin/include/content/providers/file_provider.hpp b/plugins/builtin/include/content/providers/file_provider.hpp
index 57363a0ba..75e07ae36 100644
--- a/plugins/builtin/include/content/providers/file_provider.hpp
+++ b/plugins/builtin/include/content/providers/file_provider.hpp
@@ -29,6 +29,11 @@ namespace hex::plugin::builtin {
 
         void readRaw(u64 offset, void *buffer, size_t size) override;
         void writeRaw(u64 offset, const void *buffer, size_t size) override;
+        /**
+         * @brief closes the file streams used to read the file.
+         * Need to be called on file write, see https://github.com/WerWolv/ImHex/issues/988
+         */
+        void invalidateFiles();
         [[nodiscard]] size_t getActualSize() const override;
 
         void save() override;
diff --git a/plugins/builtin/source/content/providers/file_provider.cpp b/plugins/builtin/source/content/providers/file_provider.cpp
index 5d987c342..6d73fec2a 100644
--- a/plugins/builtin/source/content/providers/file_provider.cpp
+++ b/plugins/builtin/source/content/providers/file_provider.cpp
@@ -77,7 +77,8 @@ namespace hex::plugin::builtin {
         
         writeFile.seek(offset);
         writeFile.writeBuffer(reinterpret_cast<const u8*>(buffer), size);
-        this->m_files.clear();
+
+        this->invalidateFiles();
     }
 
     void FileProvider::save() {
@@ -124,6 +125,13 @@ namespace hex::plugin::builtin {
         Provider::insert(offset, size);
     }
 
+    void FileProvider::invalidateFiles() {
+        for(auto & [threadId, file] : this->m_files){
+            file.close();
+        }
+        this->m_files.clear();
+    }
+
     void FileProvider::remove(u64 offset, size_t size) {
         auto oldSize = this->getActualSize();
         this->resize(oldSize + size);