diff --git a/library/entropy_poll.c b/library/entropy_poll.c
index 25a27be..6aa0a01 100644
--- a/library/entropy_poll.c
+++ b/library/entropy_poll.c
@@ -166,10 +166,10 @@
 
     read_len = fread( output, 1, len, file );
     if( read_len != len )
-    {
+    { // LCOV_EXCL_START
         fclose( file );
         return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED );
-    }
+    } // LCOV_EXCL_STOP
 
     fclose( file );
     *olen = len;