diff --git a/main b/main
deleted file mode 100755
index adccdbc..0000000
Binary files a/main and /dev/null differ
diff --git a/mx b/mx
index a8dd211..b3f0eb9 100755
Binary files a/mx and b/mx differ
diff --git a/src/main.cpp b/src/main.cpp
index 2dc7530..802fcde 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -131,6 +131,26 @@ class Logger {
         }
 };
 
+class SyntaxError {
+    private:
+    public:
+        void fnTypeMismatch(string function, vector<string> validTypes, valtype typeGiven) {
+            cout << "TypeError: function type mismatch" << endl;
+            cout << "Function '" << function << "' expected one of the following types: ";
+            for (int i = 0; i < validTypes.size(); i++) {
+                if (i != 0) cout << ", ";
+                cout << validTypes[i];
+            }
+            cout << endl << "Got type '";
+            if (typeGiven == valtype::INT) cout << "int";
+            else if (typeGiven == valtype::DEC) cout << "dec";
+            else if (typeGiven == valtype::STR) cout << "str";
+            else if (typeGiven == valtype::BOOL) cout << "bool";
+            else cout << "unknown";
+            cout << "' instead" << endl;
+        }
+};
+
 class Parser {
     private:
         string buffer;
@@ -333,6 +353,7 @@ class Interpreter {
             }
         }
         void executeCode(vector<Token> tokens) {
+            SyntaxError syntaxError;
             for (int i = 0; i < tokens.size(); i++) {
                 if (tokens[i].keyword == keywords::PRINT) {
                     i++;
@@ -368,8 +389,12 @@ class Interpreter {
                             case valtype::INT:
                                 exit(get<int>(nextToken.value.value));
                                 break;
+                            case valtype::DEC:
+                                exit(get<double>(nextToken.value.value));
+                                break;
                             default:
-                                log.error("Unsupported value type");
+                                vector<string> validTypes = {"int", "dec"};
+                                syntaxError.fnTypeMismatch("exit", validTypes, nextToken.type);
                         }
                     }
                 }
@@ -404,4 +429,4 @@ int main(int argc, char* argv[]) {
     // Convert to tokens and run the code
     interpreter.convertToTokens(parser.getTokens());
     return 0;
-}
\ No newline at end of file
+}
diff --git a/test.mx b/test.mx
index bd922a6..c8691f5 100644
--- a/test.mx
+++ b/test.mx
@@ -1,2 +1,2 @@
 print "Hello world!";
-exit 1;
\ No newline at end of file
+exit fjdskfdkls;