diff --git a/gettext-tools/src/Makefile.in b/gettext-tools/src/Makefile.in
index 5d60b99..d86232d 100644
--- a/gettext-tools/src/Makefile.in
+++ b/gettext-tools/src/Makefile.in
@@ -3625,7 +3625,10 @@ USEJAVA_no = 0
 
 # Version information according to Woe32 conventions.
 @WOE32_TRUE@WOE32_LDADD = gettext.res
-all: $(BUILT_SOURCES)
+@USE_INSTALLED_LIBTEXTSTYLE_FALSE@all: textstyle.h
+all:
+	$(MAKE) $(AM_MAKEFLAGS) all-parallel
+all-parallel: $(BUILT_SOURCES)
 	$(MAKE) $(AM_MAKEFLAGS) all-am
 
 .SUFFIXES:
@@ -5045,7 +5048,7 @@ uninstall-tcl:
 # namely those which build textstyle.h, po-gram-gen.c, cldr-plural.c.
 # See <https://lists.gnu.org/archive/html/bug-make/2019-05/msg00011.html>.
 # So, turn off parallel execution in this Makefile.
-.NOTPARALLEL:
+# .NOTPARALLEL:
 
 # 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.