diff --git a/RELEASE.TXT b/RELEASE.TXT
index 467372cb..44c7753c 100644
--- a/RELEASE.TXT
+++ b/RELEASE.TXT
@@ -1,4 +1,12 @@
 Version @PHREEQC_VER@: @PHREEQC_DATE@ 
+
+	-----------------
+	February 20, 2018
+	-----------------
+	Phreeqc: Fixed a segmentation fault when Cl was absent from a 
+	Pitzer calculation, but MacInnes scaling was used; further,
+	the calculation was a redox calculation.
+	
 	-----------------
 	February 17, 2018
 	-----------------