diff --git a/src/Makefile.am b/src/Makefile.am
index 47c8ec9bb..9ac058b5a 100755
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -34,9 +34,10 @@ EXTRA_DIST = Android.mk hamlibdatetime.h.in
 # directory  before  the  source directory  for  the  hamlibdatetime.h
 # header.
 hamlibdatetime.h: FORCE
+	echo "#define HAMLIBDATETIME "\"$$(TZ=UTC git --git-dir=$(top_srcdir)/.git log --no-merges --date='format-local:%b %d %H:%M:%SZ %Y SHA=' --format='%cd' -n 1)$$(git --git-dir=$(top_srcdir)/.git log --no-merges -n 1 | cut -c8-13)\"  
 	@if test -x $(top_srcdir)/.git ; then \
 		echo "/* This date time is from the last non-merge commit to Hamlib. */" > $(builddir)/$(@F).tmp ;\
-		echo "#define HAMLIBDATETIME "\"$$(TZ=UTC git --git-dir=$(top_srcdir)/.git log --no-merges --date='format-local:%b %d %H:%M:%SZ %Y SHA=' --format='%cd' -n 1)$$(git --git-dir=$(top_srcdir)/.git log --no-merges | grep commit | head -n 1 | cut -c8-13)\"  >> $(builddir)/$(@F).tmp ;\
+		echo "#define HAMLIBDATETIME "\"$$(TZ=UTC git --git-dir=$(top_srcdir)/.git log --no-merges --date='format-local:%b %d %H:%M:%SZ %Y SHA=' --format='%cd' -n 1)$$(git --git-dir=$(top_srcdir)/.git log --no-merges -n 1 | head -n 1 | cut -c8-13)\"  >> $(builddir)/$(@F).tmp ;\
 		diff -qN $(builddir)/$(@F).tmp $(builddir)/$(@F) ; test $$? -eq 0 || { echo "Generating SCS header \"$(builddir)/$(@F)\"" ; mv -f $(builddir)/$(@F).tmp $(builddir)/$(@F) ; } ;\
 		rm -f $(builddir)/$(@F).tmp ;\
 	else \