diff --git a/tools/ptraccel-debug.c b/tools/ptraccel-debug.c
index 8b800ee1..1d895983 100644
--- a/tools/ptraccel-debug.c
+++ b/tools/ptraccel-debug.c
@@ -165,9 +165,9 @@ usage(void)
 	       "	delta    ... print delta to accelerated delta\n"
 	       "	accel    ... print accel factor\n"
 	       "	sequence ... print motion for custom delta sequence\n"
-	       "--maxdx=<double>\n  ... in motion mode only. Stop increasing dx at maxdx\n"
-	       "--steps=<double>\n  ... in motion and delta modes only. Increase dx by step each round\n"
-	       "--speed=<double>\n  ... accel speed [-1, 1], default 0\n"
+	       "--maxdx=<double>  ... in motion mode only. Stop increasing dx at maxdx\n"
+	       "--steps=<double>  ... in motion and delta modes only. Increase dx by step each round\n"
+	       "--speed=<double>  ... accel speed [-1, 1], default 0\n"
 	       "\n"
 	       "If extra arguments are present and mode is not given, mode defaults to 'sequence'\n"
 	       "and the arguments are interpreted as sequence of delta x coordinates\n"