3 files changed, 14 insertions, 0 deletions
diff --git a/package/Library_package2.mk b/package/Library_package2.mk
index fcb7b6225932..223e280d2830 100644
--- a/package/Library_package2.mk
+++ b/package/Library_package2.mk
@@ -88,4 +88,10 @@ $(eval $(call gb_Library_add_exception_objects,package2,\
 	package/source/zippackage/ZipPackageStream \
 ))
 
+ifeq ($(SYSTEM_ZLIB),YES)
+$(eval $(call gb_Library_add_defs,package2,\
+	-DSYSTEM_ZLIB \
+))
+endif
+
 # vim: set noet sw=4 ts=4:
diff --git a/package/source/zipapi/Deflater.cxx b/package/source/zipapi/Deflater.cxx
index 3333c0d8794b..75d9d39e0436 100644
--- a/package/source/zipapi/Deflater.cxx
+++ b/package/source/zipapi/Deflater.cxx
@@ -27,7 +27,11 @@
  ************************************************************************/
 
 #include <package/Deflater.hxx>
+#ifdef SYSTEM_ZLIB
 #include <zlib.h>
+#else
+#include <external/zlib/zlib.h>
+#endif
 #include <com/sun/star/packages/zip/ZipConstants.hpp>
 #include <string.h> // for memset
 
diff --git a/package/source/zipapi/Inflater.cxx b/package/source/zipapi/Inflater.cxx
index b83eea021e63..2149e59e5ddf 100644
--- a/package/source/zipapi/Inflater.cxx
+++ b/package/source/zipapi/Inflater.cxx
@@ -27,7 +27,11 @@
  ************************************************************************/
 
 #include <package/Inflater.hxx>
+#ifdef SYSTEM_ZLIB
 #include <zlib.h>
+#else
+#include <external/zlib/zlib.h>
+#endif
 #include <string.h> // for memset
 
 using namespace com::sun::star::uno;