1 files changed, 3 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index bfab0f5..681b36e 100644
--- a/Makefile
+++ b/Makefile
@@ -75,13 +75,15 @@ build: pkmem-types
 build: pkmem
 build: pkstr
 build: pkev
+	echo "#ifndef PK_SINGLE_HEADER_FILE_H\n#define PK_SINGLE_HEADER_FILE_H" > pk.h
 	cat pk.h.in \
 	pkmacros.h \
 	pkmem-types.h \
 	pkmem.h \
 	pkstr.h \
 	pkev.h \
-	> pk.h
+	>> pk.h
+	echo "#endif /* PK_SINGLE_HEADER_FILE_H */" >> pk.h
 	sed -i -r \
 		-e "s/@@PK_VERSION@@/$(VERSION)/g" \
 		-e "s/@@YEAR@@/`date -u +%Y`/g" \