diff --git a/Sources/rxcc/rxcc.swift b/Sources/rxcc/rxcc.swift
index 0c2e0d5..ace3949 100644
--- a/Sources/rxcc/rxcc.swift
+++ b/Sources/rxcc/rxcc.swift
@@ -655,7 +655,8 @@ struct rxcc {
     }
 
     func lex(string: String) -> [Substring] {
-        var line = string.replacing("\n", with: " ")
+        var line = string.replacing(/\/\/.*\n/, with: "")
+        line = line.replacing("\n", with: " ")
         line = line.replacing("\t", with: " ")
         line = line.replacing("{", with: " { ")
         line = line.replacing("}", with: " } ")
diff --git a/test.c b/test.c
index 68430eb..a888c35 100644
--- a/test.c
+++ b/test.c
@@ -1,4 +1,5 @@
 int main() {
+    // Comment
     int tomas = 8;
     tomas /= 2;
     tomas *= 3;
@@ -8,7 +9,7 @@ int main() {
     tomas += 31;
     tomas &= 21;
     tomas |= 3;
-    tomas |= 303;
+    tomas |= 303; //hi
     tomas ^= 23;
     tomas ^= 27;
     tomas &= 302;