diff --git a/Source/Common/FileFormatCheck.cpp b/Source/Common/FileFormatCheck.cpp
index 4b921efe03..6f81772cc4 100644
--- a/Source/Common/FileFormatCheck.cpp
+++ b/Source/Common/FileFormatCheck.cpp
@@ -74,6 +74,8 @@ namespace FEX::FormatCheck {
       return false;
     }
 
+    close(fd);
+
     return Header.Magic == COOKIE_MAGIC_V1;
   }
 }