diff --git a/config.mk.in b/config.mk.in
index 6afb783..5961256 100644
--- a/config.mk.in
+++ b/config.mk.in
@@ -68,7 +68,7 @@ CONFIGFILE = /etc/defaults/ot-recorder
 # Optionally specify the path to the Mosquitto libs, include here
 MOSQUITTO_INC = -I/usr/include
 MOSQUITTO_LIB = -L/usr/lib
-MORELIBS = # -lssl
+MORELIBS += # -lssl
 
 # If WITH_LUA is configured, specify compilation and linkage flags
 # for Lua either manually or using pkg-config. This may require tweaking,