diff --git a/mosquitto.spec b/mosquitto.spec
index db6dfc7..ed96464 100644
--- a/mosquitto.spec
+++ b/mosquitto.spec
@@ -47,7 +47,7 @@ sed -i "s|(INSTALL) -s|(INSTALL)|g" lib/Makefile src/Makefile client/Makefile
 %build
 export CFLAGS="%{optflags}"
 export LDFLAGS="%{optflags} %{__global_ldflags} -Wl,--as-needed"
-make all %{?_smp_mflags}
+make all %{?_smp_mflags} WITH_WEBSOCKETS=yes
 
 %install
 %if "%{_lib}" == "lib64"