Index: src/modules/tls/utils/openssl_mutex_shared/Makefile
--- src/modules/tls/utils/openssl_mutex_shared/Makefile.orig
+++ src/modules/tls/utils/openssl_mutex_shared/Makefile
@@ -19,7 +19,7 @@ install-modules: openssl_mutex_shared.so
 	$(INSTALL_BIN) openssl_mutex_shared.so $(modules_prefix)/$(lib_dir)/openssl_mutex_shared
 
 openssl_mutex_shared.so: openssl_mutex_shared.c
-	$(CC) -g -D_GNU_SOURCE -std=c99 -fvisibility=hidden -pthread -o $@ -O3 -Wall -shared -fPIC -ldl $<
+	$(CC) -g -D_GNU_SOURCE -std=c99 -fvisibility=hidden -pthread -o $@ -O3 -Wall -shared -fPIC ${LIBDL} $<
 
 .PHONY: clean
 clean:
