diff --git a/src/main.c b/src/main.c
index a7af3766583d6b176d915f4a8c160974c5f112f6..dc4ef6e440f47e4b71d01ce9e76e92f5186c22ed 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1756,7 +1756,7 @@ static ParameterError getparameter(char *flag, /* f or -long-flag */
 #ifdef WIN32
           if(ptr &&
              (ptr == &nextarg[1]) &&
-             (nextarg[2] == '\\') &&
+             (nextarg[2] == '\\' || nextarg[2] == '/') &&
              (isalpha((int)nextarg[0])) )
              /* colon in the second column, followed by a backslash, and the
                 first character is an alphabetic letter: