diff --git a/CImg.h b/CImg.h
index 60947e0d..c237b210 100644
--- a/CImg.h
+++ b/CImg.h
@@ -7387,7 +7387,7 @@ namespace cimg_library {
     **/
     inline cimg_int64 fsize(std::FILE *const file) {
       if (!file) return (cimg_int64)-1;
-      long pos = std::ftell(file)
+      const long pos = std::ftell(file);
       std::fseek(file,0,SEEK_END);
       const cimg_int64 siz = (cimg_int64)std::ftell(file);
       std::fseek(file,pos,SEEK_SET);