diff --git a/programs/pkey/mpi_demo.c b/programs/pkey/mpi_demo.c
index 5b40c51..365bdc4 100644
--- a/programs/pkey/mpi_demo.c
+++ b/programs/pkey/mpi_demo.c
@@ -31,7 +31,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #define mbedtls_printf          printf
-#define MBEDTLS_EXTI_SUCCESS    EXIT_SUCCESS
+#define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
 #define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
 #endif /* MBEDTLS_PLATFORM_C */