diff --git a/build/bakefiles/Makefile b/build/bakefiles/Makefile
index 4fe3a222fb..72ad2d8afc 100644
--- a/build/bakefiles/Makefile
+++ b/build/bakefiles/Makefile
@@ -192,7 +192,7 @@ Makefile: regenMakefile.py
 
 # from ../../samples/samples.bkl
 ../../samples/Makefile.in: ../../samples/samples.bkl
-	$(BAKEFILE) $(BAKEARGS) -fautoconf -o../../samples/Makefile.in ../../samples/samples.bkl
+	$(BAKEFILE) $(BAKEARGS) -fautoconf -o../../samples/Makefile.in -DAUTOCONF_MACROS_FILE=../../autoconf_inc.m4 ../../samples/samples.bkl
 	touch ../../samples/Makefile.in
 ../../samples/makefile.bcc: ../../samples/samples.bkl
 	$(BAKEFILE) $(BAKEARGS) -fborland -o../../samples/makefile.bcc ../../samples/samples.bkl
diff --git a/build/bakefiles/regenMakefile.py b/build/bakefiles/regenMakefile.py
index 89a9985f71..5434dbbfed 100755
--- a/build/bakefiles/regenMakefile.py
+++ b/build/bakefiles/regenMakefile.py
@@ -64,7 +64,8 @@ addMakefile('wx.bkl', {'all':'..','autoconf':'../..'},
              'multilib.bkl', 'wxwin.py'])
 
 # samples main makefile:
-addMakefile('../../samples/samples.bkl', {'all':'../../samples'})
+addMakefile('../../samples/samples.bkl', {'all':'../../samples'},
+            args={'autoconf':'-DAUTOCONF_MACROS_FILE=../../autoconf_inc.m4'})
 
 
 CONTRIB_DIR = 1