diff --git a/aclocal/canonicalize-tools.m4 b/aclocal/canonicalize-tools.m4
index 7875b3f8dd..42d798706f 100644
--- a/aclocal/canonicalize-tools.m4
+++ b/aclocal/canonicalize-tools.m4
@@ -15,7 +15,7 @@ AC_DEFUN(RTEMS_GCC_PRINT,
   *cygwin32*)
     dnl FIXME: Hack for cygwin/egcs reporting mixed '\\' and '/'
     dnl        Should be removed once cygwin/egcs reports '/' only
-    $1=`$CC_FOR_TARGET --print-prog-name=$2 | sed -e "s%\\\\%/%g" `
+    $1=`$CC_FOR_TARGET --print-prog-name=$2 | sed -e 's%\\\\%/%g' `
     ;;
   *)
     $1=`$CC_FOR_TARGET --print-prog-name=$2`