diff --git a/examples/QuickLymanAlpha/L050N0752/qla_50.yml b/examples/QuickLymanAlpha/L050N0752/qla_50.yml
index 02bc199d05d0a9f687e536a814da25c1b79437f1..cd3a96715854abcc8d76c9f5a280c2b9c47a4bcc 100644
--- a/examples/QuickLymanAlpha/L050N0752/qla_50.yml
+++ b/examples/QuickLymanAlpha/L050N0752/qla_50.yml
@@ -3,7 +3,7 @@ MetaData:
 
 # Define the system of units to use internally. 
 InternalUnitSystem:
-  UnitMass_in_cgs:     1.98848e43    # 10^10 M_sun in grams
+  UnitMass_in_cgs:     1.98841e43    # 10^10 M_sun in grams
   UnitLength_in_cgs:   3.08567758e24 # Mpc in centimeters
   UnitVelocity_in_cgs: 1e5           # km/s in centimeters per second
   UnitCurrent_in_cgs:  1             # Amperes