diff --git a/AlgebraicDataflowArchitectureModel/src/code/ast/NumberLiteral.java b/AlgebraicDataflowArchitectureModel/src/code/ast/NumberLiteral.java
index be1dbd5..ac75f20 100644
--- a/AlgebraicDataflowArchitectureModel/src/code/ast/NumberLiteral.java
+++ b/AlgebraicDataflowArchitectureModel/src/code/ast/NumberLiteral.java
@@ -48,9 +48,8 @@
 		}
 		
 		// TODO: 0 check
-		// TODO: Octal number
 		
-		if (NumberUtil.isBinaryNumber(tokenValue) || NumberUtil.isHexNumber(tokenValue)) {
+		if (NumberUtil.isBinaryNumber(tokenValue) || NumberUtil.isOctalNumber(tokenValue) || NumberUtil.isHexNumber(tokenValue)) {
 			this.tokenValue = tokenValue;
 		} else {
 			throw new IllegalArgumentException("Invalid number literal: " + tokenValue);