diff --git a/ChangeLog b/ChangeLog
index 63d7b0400d..e4339fc948 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-01-17  Pádraig Brady  <P@draigBrady.com>
+
+	parse-datetime: fix dependence on AC_PROG_SED
+	* modules/parse-datetime: Use `sed` directly like all other modules.
+	Reported by J William Piggott
+
 2017-01-16  Paul Eggert  <eggert@cs.ucla.edu>
 
 	intprops: update doc URLs
diff --git a/modules/parse-datetime b/modules/parse-datetime
index 1e9144183c..20d4236417 100644
--- a/modules/parse-datetime
+++ b/modules/parse-datetime
@@ -37,7 +37,7 @@ parse-datetime.c: parse-datetime.y
 	                              y.tab.h parse-datetime.h \
 	                              y.output parse-datetime.output \
 	                              -- $(YACC) $(YFLAGS) $(AM_YFLAGS) && \
-	$(SED) 's|".*/parse-datetime.y"|"parse-datetime.y"|' \
+	sed -e 's|".*/parse-datetime.y"|"parse-datetime.y"|' \
 	 < parse-datetime.c > parse-datetime.c-t && \
 	mv parse-datetime.c-t $(srcdir)/parse-datetime.c
 lib_SOURCES += parse-datetime.y