diff --git a/simd/nasm_lt.sh b/simd/nasm_lt.sh
index ef5a591..68893b7 100755
--- a/simd/nasm_lt.sh
+++ b/simd/nasm_lt.sh
@@ -11,7 +11,7 @@
                 pic=yes
             fi
             ;;
-        -f|-fbin|-faout|-faoutb|-fcoff|-felf|-fas86| \
+        -f|-fbin|-faout|-faoutb|-fcoff|-felf|-felf64|-fas86| \
         -fobj|-fwin32|-frdf|-fieee|-fmacho)
             # it's a file format specifier for nasm.
             command="$command $1"