diff --git a/Makefile.am b/Makefile.am
index abc3d7760..0fd4ccc0c 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -48,4 +48,7 @@ doxygen:
 eolspace:
 	find \( -name '*.c' -o -name '*.h' -o -name 'Makefile.am' \) -exec perl -i -pe 's/\s+\n$$/\1\n/;' \{\} \;
 
+untabify:
+	find \( -name '*.c' -o -name '*.h' \) -exec perl -i -pe 's/\t/        /g;' \{\} \;
+
 .PHONY: homepage distcleancheck doxygen