1 files changed, 3 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index d5fc8f7..32373e5 100644
--- a/Makefile
+++ b/Makefile
@@ -879,6 +879,9 @@ endif
 
 ifeq ($(USE_INTERNAL_ZLIB),1)
   BASE_CFLAGS += -DNO_GZIP
+  ifneq ($(USE_LOCAL_HEADERS),1)
+    BASE_CFLAGS += -I$(ZDIR)
+  endif
 else
   LIBS += -lz
 endif