diff --git a/tools/nasm-filter.sh b/tools/nasm-filter.sh
index a8ac9d1..73d23b8 100755
--- a/tools/nasm-filter.sh
+++ b/tools/nasm-filter.sh
@@ -1,4 +1,4 @@
-#/bin/sh
+#!/bin/sh
 
 # Filter out unnecessary options added by automake
 
diff --git a/tools/yasm-filter.sh b/tools/yasm-filter.sh
index 1d72031..2b8363a 100755
--- a/tools/yasm-filter.sh
+++ b/tools/yasm-filter.sh
@@ -1,4 +1,4 @@
-#/bin/sh
+#!/bin/sh
 
 # Filter out unnecessary options added by automake