diff --git a/test-app/Makefile b/test-app/Makefile
index 94e8c05b..a7d1ba39 100644
--- a/test-app/Makefile
+++ b/test-app/Makefile
@@ -1274,6 +1274,7 @@ ifeq ($(TARGET),ti_am64x)
 
   ifeq ($(PKA),1)
     CFLAGS+=-DWOLFSSL_TI_AM64X
+    CFLAGS+=-DWOLFSSL_TI_AM64X_RNG_CTR_DRBG
     APP_OBJS+=\
       $(WOLFBOOT_LIB_WOLFSSL)/wolfcrypt/src/cryptocb.o \
       $(WOLFBOOT_LIB_WOLFSSL)/wolfcrypt/src/port/ti/ti-sa2ul_port.o