diff --git a/src/indent_helper.hpp b/src/indent_helper.hpp
index 9e27916..fcc8ad0 100644
--- a/src/indent_helper.hpp
+++ b/src/indent_helper.hpp
@@ -1,5 +1,11 @@
 #pragma once
 #include <stack>
+enum class IndentAction
+{
+    Indent,
+    Dedent,
+    None
+};
 
 class IndentHelper
 {
@@ -9,19 +15,19 @@ class IndentHelper
 public:
     IndentHelper() { indent_stack.push(0); }
 
-    int processLine(int spaces)
+    IndentAction processLine(int spaces)
     {
         int current = indent_stack.top();
 
         if (spaces == current)
         {
-            return 0;
+            return IndentAction::None;
         }
 
         if (spaces > current)
         {
             indent_stack.push(spaces);
-            return 1;
+            return IndentAction::Indent;
         }
 
         pending_dedents = 0;
@@ -34,10 +40,10 @@ public:
         if (pending_dedents > 0)
         {
             pending_dedents--;
-            return -1;
+            return IndentAction::Dedent;
         }
 
-        return 0;
+        return IndentAction::None;
     }
 
     // returns false on failure
diff --git a/src/lexer.l b/src/lexer.l
index 9658e35..3ec588b 100644
--- a/src/lexer.l
+++ b/src/lexer.l
@@ -18,9 +18,9 @@
     for (int i = 0; i < yyleng; i++)
         spaces += (yytext[i] == '\t') ? 8 : 1;
 
-    int result = indent_helper.processLine(spaces);
-    if (result > 0) return yy::parser::token::TOK_INDENT;
-    if (result < 0) return yy::parser::token::TOK_DEDENT;
+    IndentAction result = indent_helper.processLine(spaces);
+    if (result == IndentAction::Indent) return yy::parser::token::TOK_INDENT;
+    if (result == IndentAction::Dedent) return yy::parser::token::TOK_DEDENT;
 }
 
 \n       { return yy::parser::token::TOK_NEWLINE; }
diff --git a/src/scanner.hpp b/src/scanner.hpp
index f78194e..f86630d 100644
--- a/src/scanner.hpp
+++ b/src/scanner.hpp
@@ -25,9 +25,7 @@ public:
 
         if (token == yy::parser::token::TOK_EOF)
         {
-            int result = indent_helper.processLine(0);
-
-            if (result == -1)
+            if (indent_helper.processLine(0) == IndentAction::Dedent)
             {
                 return yy::parser::token::TOK_DEDENT;
             }