1 files changed, 3 insertions, 2 deletions
diff --git a/config.mk b/config.mk
index 7450b5d..6941713 100644
--- a/config.mk
+++ b/config.mk
@@ -22,8 +22,9 @@ INCS = $(X11INC) $(GTKINC)
 LIBS = $(X11LIB) $(GTKLIB) -lgthread-2.0
 
 # flags
-CPPFLAGS = -DVERSION=\"$(VERSION)\" -DWEBEXTDIR=\"$(LIBDIR)\" \
-           -D_DEFAULT_SOURCE -DGCR_API_SUBJECT_TO_CHANGE
+CPPFLAGS = -DVERSION=\"$(VERSION)\" -DGCR_API_SUBJECT_TO_CHANGE \
+           -DLIBPREFIX=\"$(LIBPREFIX)\" -DWEBEXTDIR=\"$(LIBDIR)\" \
+           -D_DEFAULT_SOURCE
 SURFCFLAGS = -fPIC $(INCS) $(CPPFLAGS)
 WEBEXTCFLAGS = -fPIC $(WEBEXTINC)