diff --git a/hostapd/Makefile b/hostapd/Makefile
index 3c6bd4a6d..e54843001 100644
--- a/hostapd/Makefile
+++ b/hostapd/Makefile
@@ -335,6 +335,7 @@ CFLAGS += -DEAP_TNC
 OBJS += ../src/eap_server/eap_tnc.o
 OBJS += ../src/eap_server/tncs.o
 NEED_BASE64=y
+LIBS += -ldl
 endif
 
 # Basic EAP functionality is needed for EAPOL
diff --git a/wpa_supplicant/Makefile b/wpa_supplicant/Makefile
index 73d3aa5d4..9f7a785bc 100644
--- a/wpa_supplicant/Makefile
+++ b/wpa_supplicant/Makefile
@@ -566,6 +566,7 @@ OBJS += ../src/eap_peer/tncc.o
 OBJS_h += ../src/eap_server/eap_tnc.o
 OBJS_h += ../src/eap_server/tncs.o
 NEED_BASE64=y
+LIBS += -ldl
 endif
 
 ifdef CONFIG_IEEE8021X_EAPOL