diff --git a/sit.dat b/sit.dat
index c63d2dc1..ad2cfff0 100644
--- a/sit.dat
+++ b/sit.dat
@@ -72,7 +72,7 @@ H(0)          H2             0            H             1.0079
 Hf            Hf+4          -4            Hf            178.49
 Hg            Hg+2           0            Hg            200.59
 Hg(+2)        Hg+2           0            Hg            200.59
-Hg2(+2)       Hg2+2          0            Hg2           401.18
+Hg(+1)        Hg2+2          0            Hg2           401.18
 Ho            Ho+3           0            Ho            164.9303
 I             I-             0            I             126.9045
 I(+5)         IO3-           0            I             126.9045