diff --git a/src/tools/uchardet.cpp b/src/tools/uchardet.cpp
index 56eed7b..d5ff167 100644
--- a/src/tools/uchardet.cpp
+++ b/src/tools/uchardet.cpp
@@ -266,6 +266,7 @@ int main(int argc, char ** argv)
             printf("%s: ", filename);
         }
         detect(handle, f, show_lang, verbose);
+        fclose(f);
     }
 
     uchardet_delete(handle);