diff --git a/Rules/Braille/ASCIIMath/definitions.yaml b/Rules/Braille/ASCIIMath/definitions.yaml
index ff8b98e9..e2d9fbb6 100644
--- a/Rules/Braille/ASCIIMath/definitions.yaml
+++ b/Rules/Braille/ASCIIMath/definitions.yaml
@@ -11,7 +11,7 @@
     "lambda", "Lambda", "and", "or", "if",
     "lim", "Lim",
     "sin", "cos", "tan", "arcsin", "arccos", "arctan", "sinh", "cosh", "tanh", "cot", "coth", "sech", "csch", "sec", "csc",
-    "log", "ln", "abs", "norm", "floor", "ceil",
+    "log", "lg", "ln", "abs", "norm", "floor", "ceil",
     "Sin", "Cos", "Tan", "Arcsin", "Arccos", "Arctan", "Sinh", "Cosh", "Tanh", "Cot", "Sec", "Csc",
     "Log", "Ln", "det", "exp", "dim", "mod", "gcd", "lcm", "lub", "glb", "min", "max",
   }
@@ -30,4 +30,4 @@
 
 - UnderAccents: {
     "¯": "ul", "⏟": "ubrace",
-  }
\ No newline at end of file
+  }
diff --git a/tests/braille/ASCIIMath/augenbit.rs b/tests/braille/ASCIIMath/augenbit.rs
index 6a0b615a..45abef76 100644
--- a/tests/braille/ASCIIMath/augenbit.rs
+++ b/tests/braille/ASCIIMath/augenbit.rs
@@ -130,6 +130,14 @@ fn augenbit1_7_7 () -> Result<()> {
 
 }
 
+#[test]
+fn augenbit1_7_8 () -> Result<()> {
+    let expr = r#"<math><mi>lg</mi><mi>a</mi></math>"#;
+    test_braille("ASCIIMath", expr, r"lg a")?;
+    return Ok(());
+
+}
+
 #[test]
 fn augenbit1_7_10 () -> Result<()> {
     let expr = r#"<math><msup><mi>cos</mi><mn>2</mn></msup><mi>&#x3B2;</mi></math>"#;