diff --git a/SCons/Config/default b/SCons/Config/default
index fa40ec77..77eb550b 100644
--- a/SCons/Config/default
+++ b/SCons/Config/default
@@ -5,7 +5,7 @@ Import('defenv')
 ### flags
 
 defenv['ENTRY_FLAG'] = lambda x: ''
-defenv['MAP_FLAG'] = lambda x: ''
+defenv['MAP_FLAG'] = ''
 defenv['EXCEPTION_FLAG'] = ''
 defenv['NODEFLIBS_FLAG'] = ''
 defenv['C_FLAG'] = ''
diff --git a/SCons/Config/gnu b/SCons/Config/gnu
index c1614ff8..8cc6e2ad 100644
--- a/SCons/Config/gnu
+++ b/SCons/Config/gnu
@@ -17,7 +17,7 @@ def cross_env(env):
 ### flags
 
 defenv['ENTRY_FLAG'] = lambda x: '-Wl,-e,_' + x + '@16'
-defenv['MAP_FLAG'] = lambda x: '-Wl,-Map,${TARGET.base}.map'
+defenv['MAP_FLAG'] = '-Wl,-Map,${TARGET.base}.map'
 defenv['EXCEPTION_FLAG'] = ''
 defenv['NODEFLIBS_FLAG'] = '-nostdlib -Wl,--exclude-libs,msvcrt.a'
 defenv['C_FLAG'] = '-x c'
diff --git a/SCons/Config/ms b/SCons/Config/ms
index 1bcee791..60e72bd0 100644
--- a/SCons/Config/ms
+++ b/SCons/Config/ms
@@ -5,7 +5,7 @@ Import('defenv')
 ### flags
 
 defenv['ENTRY_FLAG'] = lambda x: '/entry:' + x
-defenv['MAP_FLAG'] = lambda x: '/map'
+defenv['MAP_FLAG'] = '/map'
 defenv['EXCEPTION_FLAG'] = '/GX'
 defenv['NODEFLIBS_FLAG'] = '/NODEFAULTLIB'
 defenv['C_FLAG'] = '/TC'