diff --git a/Luminary099/INFLIGHT_ALIGNMENT_ROUTINES.agc b/Luminary099/INFLIGHT_ALIGNMENT_ROUTINES.agc
index 0c70d92..2e519cb 100644
--- a/Luminary099/INFLIGHT_ALIGNMENT_ROUTINES.agc
+++ b/Luminary099/INFLIGHT_ALIGNMENT_ROUTINES.agc
@@ -93,7 +93,7 @@ CALCGTA		ITA	DLOAD		# PUSHDOWN 00-03, 16D-27D, 34D-37D
 # Page 1251
 # ARCTRIG COMPUTES AN ANGLE GIVEN THE SINE AND COSINE OF THIS ANGLE.
 #
-# THE INPUTS ARE SIN/4 AND COS/4 STORED UP AT SINTH AND COSTH.
+# THE INPUTS ARE SIN/4 AND COS/4 STORED DP AT SINTH AND COSTH.
 #
 # THE OUTPUT IS THE CALCULATED ANGLE BETWEEN +.5 AND -.5 REVOLUTIONS AND STORED AT THETA.  THE OUTPUT IS ALSO
 # AVAILABLE AT MPAC.