diff --git a/src/options.c b/src/options.c
index 18d08dc..218a04f 100644
--- a/src/options.c
+++ b/src/options.c
@@ -296,7 +296,7 @@ int nwipe_options_parse( int argc, char** argv )
 						{ /* This section deals with file names that exceed
 						     MAX_DRIVE_PATH_LENGTH */
 							nwipe_options.exclude[idx_drive][idx_drive_chr] = 0;
-							while( optarg[idx_optarg] != 0 || optarg[idx_optarg] != ',' )
+							while( optarg[idx_optarg] != 0 && optarg[idx_optarg] != ',' )
 							{
 								idx_optarg++;
 							}