diff --git a/cgnslib.spec b/cgnslib.spec
index 49ddd21..eaae525 100644
--- a/cgnslib.spec
+++ b/cgnslib.spec
@@ -72,7 +72,7 @@ find %{buildroot} -name '*.a' -delete -print
 
 # Add shebang
 # NEED CHECK - really need?
-sed -i -e '1i#!/bin/sh' %{buildroot}%{_bindir}/cgconfig
+sed -i -e '1i#!%{_bindir}/sh' %{buildroot}%{_bindir}/cgconfig
 
 %check
 LD_LIBRARY_PATH=%{buildroot}%{_libdir} make test