diff --git a/hostapd/Makefile b/hostapd/Makefile
index e46561e70..75767aee7 100644
--- a/hostapd/Makefile
+++ b/hostapd/Makefile
@@ -678,6 +678,7 @@ endif
 endif
 
 ifdef NEED_SHA256
+CFLAGS += -DCONFIG_SHA256
 OBJS += ../src/crypto/sha256.o
 ifdef CONFIG_INTERNAL_SHA256
 OBJS += ../src/crypto/sha256-internal.o