diff --git a/Makefile.common b/Makefile.common
index 5d3bf24244..89f9a0b02d 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -1634,6 +1634,7 @@ ifeq ($(HAVE_NETWORKING), 1)
 
    ifeq ($(HAVE_LUA), 1)
       DEFINES += -DHAVE_LUA \
+         -DLUA_32BITS \
          -Ideps/lua/src
       OBJ += deps/lua/src/lapi.o \
          deps/lua/src/lcode.o \