1 files changed, 1 insertions, 1 deletions

diff --git a/src/GNUmakefile b/src/GNUmakefile
index ee263b0..6a0bb3c 100644
--- a/src/GNUmakefile
+++ b/src/GNUmakefile
@@ -20,7 +20,7 @@ OS_$(d) = $(shell $(d)/../mk/vendor.os)
 CC_$(d) = $(shell env CC="$(CC) "$(d)/../mk/vendor.cc)
 LUAPATH_$(d) = $(shell env CC="$(CC)" CPPFLAGS="$(CPPFLAGS)" LDFLAGS="$(LDFLAGS)" $(<D)/../mk/lua.path -krxm3 -I$(DESTDIR)$(includedir) -I/usr/include -I/usr/local/include -P$(DESTDIR)$(bindir) -P$(bindir) -L$(DESTDIR)$(libdir) -L$(libdir) -v$(1) $(2))
 
-CPPFLAGS_$(d) = $(CPPFLAGS_$(abspath $(@D)/../..))
+CPPFLAGS_$(d) = $(CPPFLAGS_$(abspath $(@D)/../..)) -DLUA_COMPAT_APIUNSIGNED
 CFLAGS_$(d) = $(CFLAGS_$(abspath $(@D)/../..))
 LDFLAGS_$(d) = $(LDFLAGS_$(abspath $(@D)/../..))
 SOFLAGS_$(d) = $(SOFLAGS_$(abspath $(@D)/../..))