diff --git a/SPECS/rtmpdump.spec b/SPECS/rtmpdump.spec
index 60e6fbc..4cc2470 100644
--- a/SPECS/rtmpdump.spec
+++ b/SPECS/rtmpdump.spec
@@ -47,7 +47,7 @@ contains include files needed to develop applications using librtmp.
 
 %build
 # The fact that we have to add -ldl for gnutls is Fedora bug #611318
-make SYS=posix CRYPTO=GNUTLS SHARED=yes OPT="%{optflags}" LIB_GNUTLS="-lgnutls -lgcrypt -ldl -lz"
+make SYS=posix CRYPTO=GNUTLS SHARED=yes OPT="%{optflags}" LIB_GNUTLS="-lgnutls -lgcrypt -ldl -lz -lgmp"
 
 %install
 make CRYPTO=GNUTLS SHARED=yes DESTDIR=%{buildroot} prefix=%{_prefix} mandir=%{_mandir} libdir=%{_libdir} install