diff --git a/Makefile.am b/Makefile.am
index a002d546..cda30dce 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -430,3 +430,5 @@ gen-psqr_.c: gen-psqr.c $(ANSI2KNR)
 dist-hook:
 	-find $(distdir) \( -name CVS -type d \) -o -name "*~" -o -name ".#*" \
 		| xargs rm -rf
+	touch $(distdir)/demos/calc/calc.c $(distdir)/demos/calc/calcread.c $(distdir)/demos/calc/calc-common.h $(distdir)/demos/calc/calc.h $(distdir)/demos/calc/calclex.c
+	
\ No newline at end of file
diff --git a/Makefile.in b/Makefile.in
index e3a266f3..0b4f62f3 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -1335,6 +1335,7 @@ gen-psqr_.c: gen-psqr.c $(ANSI2KNR)
 dist-hook:
 	-find $(distdir) \( -name CVS -type d \) -o -name "*~" -o -name ".#*" \
 		| xargs rm -rf
+	touch $(distdir)/demos/calc/calc.c $(distdir)/demos/calc/calcread.c $(distdir)/demos/calc/calc-common.h $(distdir)/demos/calc/calc.h $(distdir)/demos/calc/calclex.c
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT: