diff --git a/lexer/numbers.go b/lexer/numbers.go
index a92f405..1e486fe 100644
--- a/lexer/numbers.go
+++ b/lexer/numbers.go
@@ -36,7 +36,7 @@ func (lexer *LexingOperation) tokenizeNumberBeginning (negative bool) (err error
 			isFloat, amountRead,
 			err = lexer.tokenizeNumber(10)
 			
-		} else if lexer.char >= '0' && lexer.char <= '8' {
+		} else if lexer.char >= '0' && lexer.char <= '7' {
 			intNumber, floatNumber,
 			isFloat, amountRead,
 			err = lexer.tokenizeNumber(8)
diff --git a/tests/parser/func/main.arf b/tests/parser/func/main.arf
index 59499c8..bff967c 100644
--- a/tests/parser/func/main.arf
+++ b/tests/parser/func/main.arf
@@ -15,15 +15,15 @@ func ro bMethod
 
 func ro cBasicPhrases
 	---
-	fn 329 983 09
-	[fn 329 983 09]
+	fn 329 983 07
+	[fn 329 983 07]
 	[fn
 		329
 		983
-		091]
+		071]
 	fn [gn
 		329 983
-		091] 123
+		071] 123
 
 func ro dArgumentTypes
 	---
@@ -74,7 +74,7 @@ func ro fReturnDirection
 	[fn
 		329
 		983
-		091] -> thing:Int err
+		071] -> thing:Int err
 
 func ro gControlFlow
 	---