diff --git a/src/main.c b/src/main.c
index 5ede3fac0..a7c516be8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1225,7 +1225,7 @@ static ParameterError getparameter(char *flag, /* f or -long-flag */
           if(strequal("-", nextarg))
             file = stdin;
           else 
-            file = fopen(nextarg, "r");
+            file = fopen(nextarg, "rb");
 
           if(subletter == 'b') /* forced binary */
             postdata = file2memory(file, &config->postfieldsize);