diff --git a/Makefile.in b/Makefile.in
index 7aac403..6f958ae 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -460,7 +460,7 @@ $(srcdir)/src/stamp-h.in: $(AUTOCONF_INPUTS)
 
 # ==================== Installation ====================
 
-.PHONY: install install-arch-dep install-arch-indep install-etcdoc install-info
+.PHONY: install install-arch-dep install-arch-indep install-c-src install-etcdoc install-info
 .PHONY: install-man install-etc install-strip install-$(NTDIR)
 .PHONY: uninstall uninstall-$(NTDIR)
 
@@ -468,7 +468,7 @@ $(srcdir)/src/stamp-h.in: $(AUTOCONF_INPUTS)
 ## don't have to duplicate the list of utilities to install in
 ## this Makefile as well.
 
-install: all install-arch-indep install-etcdoc install-arch-dep install-$(NTDIR) blessmail
+install: all install-arch-indep install-c-src install-etcdoc install-arch-dep install-$(NTDIR) blessmail
 	@true
 
 ## Ensure that $subdir contains a subdirs.el file.
@@ -504,6 +504,12 @@ else
 	rm -rf ${ns_appresdir}/share
 endif
 
+### Copy C files to the destination dir, so users can view the source
+### code of C functions with `find-file'.
+install-c-src:
+	${MKDIR_P} "$(DESTDIR)${datadir}/emacs/${version}/src"
+	cp ${srcdir}/src/*.{c,h} "$(DESTDIR)${datadir}/emacs/${version}/src"
+
 ### Windows-specific install target for installing programs produced
 ### in nt/, and its Posix do-nothing shadow.
 install-: