diff --git a/src/sbbs3/gtkuserlist/GNUmakefile b/src/sbbs3/gtkuserlist/GNUmakefile
index 40dc2ad6711804f888300e05d3c9553c286cc345..77189edabc602272c72875682de9457955853906 100644
--- a/src/sbbs3/gtkuserlist/GNUmakefile
+++ b/src/sbbs3/gtkuserlist/GNUmakefile
@@ -23,7 +23,7 @@ endif
 
 vpath %.c ..
 
-CFLAGS	+=	$(SBBSDEFS) -I.. -I../../comio $(SMBLIB_CFLAGS) $(HASH_CFLAGS) $(XPDEV-MT_CFLAGS) `pkg-config gtk+-3.0 --cflags`
+CFLAGS	+=	$(SBBSDEFS) -I.. -I../../comio $(SMBLIB_CFLAGS) $(HASH_CFLAGS) $(XPDEV-MT_CFLAGS) $(CRYPT_CFLAGS) `pkg-config gtk+-3.0 --cflags`
 # Hopefully, -Wl,-E exports all symbols dynamically everywhere.
 LDFLAGS	+=	-Wl,-E -L../$(LIBODIR) $(SMBLIB_LDFLAGS) $(XPDEV-MT_LDFLAGS) $(MT_LDFLAGS)
 EXTRA_LIBS += `pkg-config gtk+-3.0 --libs`