diff --git a/tools/tpm/Makefile b/tools/tpm/Makefile
index c3c01f2e0..62e09b361 100644
--- a/tools/tpm/Makefile
+++ b/tools/tpm/Makefile
@@ -13,7 +13,7 @@ WOLFBOOTDIR = ../..
 WOLFDIR = $(WOLFBOOTDIR)/lib/wolfssl/
 WOLFTPMDIR = $(WOLFBOOTDIR)/lib/wolfTPM/
 CFLAGS = -Wall -Wextra -Werror
-CFLAGS += -DWOLFSSL_USER_SETTINGS -DWOLFTPM_USER_SETTINGS -DWOLFBOOT_TPM
+CFLAGS += -DWOLFSSL_USER_SETTINGS -DWOLFTPM_USER_SETTINGS -DWOLFBOOT_TPM -DHAVE_NETDB_H
 CFLAGS += -I. -I$(WOLFDIR) -I$(WOLFTPMDIR) -I$(WOLFBOOTDIR)/include
 LDFLAGS =
 OBJDIR = ./