diff --git a/library/entropy.c b/library/entropy.c
index fd2c207..81b4c50 100644
--- a/library/entropy.c
+++ b/library/entropy.c
@@ -466,7 +466,7 @@
 #if defined(MBEDTLS_FS_IO)
 int mbedtls_entropy_write_seed_file( mbedtls_entropy_context *ctx, const char *path )
 {
-    int ret = 0;
+    int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
     FILE *f = NULL;
     unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE];
 
@@ -488,6 +488,8 @@
         goto exit;
     }
 
+    ret = 0;
+
 exit:
     mbedtls_platform_zeroize( buf, sizeof( buf ) );