diff --git a/bin/am2cmake.py b/bin/am2cmake.py
index b2384844efd6471c1c38d036261272586dafff2a..ded76f353f0c0b430ed1e72920e99b93722f21a5 100755
--- a/bin/am2cmake.py
+++ b/bin/am2cmake.py
@@ -562,7 +562,7 @@ def am_2_cmake_dir(directory):
 'add_doxygen_target()']))
         output.close()
     # Add directives to create CMake packe configuration files with autotools
-    output=open("Makefile.am'", "a")
+    output=open("Makefile.am", "a")
     output.write('\n'.join(['', '# Generate package configuration files for finding',
                             '# installed modules with CMake',
                             'include $(top_srcdir)/am/cmake-pkg-config\n']))