diff --git a/programs/util/pem2der.c b/programs/util/pem2der.c
index 73a9fb5..0b2eff2 100644
--- a/programs/util/pem2der.c
+++ b/programs/util/pem2der.c
@@ -33,6 +33,7 @@
 #define mbedtls_free            free
 #define mbedtls_calloc          calloc
 #define mbedtls_printf          printf
+#define mbedtls_exit            exit
 #define MBEDTLS_EXIT_SUCCESS    EXIT_SUCCESS
 #define MBEDTLS_EXIT_FAILURE    EXIT_FAILURE
 #endif /* MBEDTLS_PLATFORM_C */
@@ -60,7 +61,7 @@
 int main( void )
 {
     mbedtls_printf("MBEDTLS_BASE64_C and/or MBEDTLS_FS_IO not defined.\n");
-    return( 0 );
+    mbedtls_exit( 0 );
 }
 #else
 /*
@@ -287,6 +288,6 @@
     fflush( stdout ); getchar();
 #endif
 
-    return( exit_code );
+    mbedtls_exit( exit_code );
 }
 #endif /* MBEDTLS_BASE64_C && MBEDTLS_FS_IO */