diff --git a/Makefile.pre.in b/Makefile.pre.in
index 9bcbdab5555..31e7f2e5e74 100644
--- a/Makefile.pre.in
+++ b/Makefile.pre.in
@@ -536,9 +536,12 @@ Modules/python.o: $(srcdir)/Modules/python.c
 	$(MAINCC) -c $(PY_CFLAGS) -o $@ $(srcdir)/Modules/python.c
 
 
-$(GRAMMAR_H) $(GRAMMAR_C): $(PGEN) $(GRAMMAR_INPUT)
+# Use a stamp file to prevent make -j invoking pgen twice
+$(GRAMMAR_H) $(GRAMMAR_C): Parser/pgen.stamp
+Parser/pgen.stamp: $(PGEN) $(GRAMMAR_INPUT)
 		-@$(INSTALL) -d Include
-		-$(PGEN) $(GRAMMAR_INPUT) $(GRAMMAR_H) $(GRAMMAR_C)
+		$(PGEN) $(GRAMMAR_INPUT) $(GRAMMAR_H) $(GRAMMAR_C)
+		-touch Parser/pgen.stamp
 
 $(PGEN):	$(PGENOBJS)
 		$(CC) $(OPT) $(LDFLAGS) $(PGENOBJS) $(LIBS) -o $(PGEN)
@@ -1184,7 +1187,7 @@ profile-removal:
 
 clobber: clean profile-removal
 	-rm -f $(BUILDPYTHON) $(PGEN) $(LIBRARY) $(LDLIBRARY) $(DLLLIBRARY) \
-		tags TAGS \
+		tags TAGS Parser/pgen.stamp \
 		config.cache config.log pyconfig.h Modules/config.c
 	-rm -rf build platform
 	-rm -rf $(PYTHONFRAMEWORKDIR)
diff --git a/Misc/NEWS b/Misc/NEWS
index 22810fe5e22..a410b940b66 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -105,6 +105,8 @@ Extension Modules
 Build
 -----
 
+- Don't run pgen twice when using make -j.
+
 - Issue #7716: Under Solaris, don't assume existence of /usr/xpg4/bin/grep in
   the configure script but use $GREP instead.  Patch by Fabian Groffen.