diff --git a/audio.c b/audio.c
index cc3869e..ae64361 100644
--- a/audio.c
+++ b/audio.c
@@ -3040,7 +3040,7 @@ int main(int argc, char *const argv[])
 		return -1;
 	    default:
 		PrintVersion();
-		fprintf(stderr, "Unkown option '%c'\n", optopt);
+		fprintf(stderr, "Unknown option '%c'\n", optopt);
 		return -1;
 	}
 	break;
diff --git a/softhddev.c b/softhddev.c
index 559f728..b68b62b 100644
--- a/softhddev.c
+++ b/softhddev.c
@@ -2909,7 +2909,7 @@ int ProcessArgs(int argc, char *const argv[])
 		    optopt);
 		return 0;
 	    default:
-		fprintf(stderr, _("Unkown option '%c'\n"), optopt);
+		fprintf(stderr, _("Unknown option '%c'\n"), optopt);
 		return 0;
 	}
 	break;
diff --git a/video.c b/video.c
index beca423..d4c9a5a 100644
--- a/video.c
+++ b/video.c
@@ -11153,7 +11153,7 @@ int main(int argc, char *const argv[])
 		return -1;
 	    default:
 		PrintVersion();
-		fprintf(stderr, "Unkown option '%c'\n", optopt);
+		fprintf(stderr, "Unknown option '%c'\n", optopt);
 		return -1;
 	}
 	break;