diff --git a/libs/wpp/Makefile.in b/libs/wpp/Makefile.in
index 950712f3e1d..acd74b6d5a1 100644
--- a/libs/wpp/Makefile.in
+++ b/libs/wpp/Makefile.in
@@ -2,6 +2,7 @@ TOPSRCDIR = @top_srcdir@
 TOPOBJDIR = ../..
 SRCDIR    = @srcdir@
 VPATH     = @srcdir@
+DLLFLAGS  = @DLLFLAGS@
 MODULE    = libwpp.a
 
 C_SRCS = \