diff --git a/hscript/Optimizer.hx b/hscript/Optimizer.hx
index 00d4a43..3886d0c 100644
--- a/hscript/Optimizer.hx
+++ b/hscript/Optimizer.hx
@@ -83,9 +83,9 @@ class Optimizer {
 						return mk(EParent(e2), s);
 					}
 				}
-				if(isConstant(e1) && isConstant(e2)) {
-					var c1 = getConstant(e1);
-					var c2 = getConstant(e2);
+				if(isBool(e1) && isBool(e2)) {
+					var c1 = getBool(e1);
+					var c2 = getBool(e2);
 
 					if(c1 == false && c2 == true) { // (VAR ? false : true)
 						return optimize(mk(EUnop("!", true, econd), s));
@@ -356,6 +356,14 @@ class Optimizer {
 		}
 	}
 
+	static function isBool(e:Expr):Bool {
+		return switch(Tools.expr(e)) {
+			case EIdent("true") | EIdent("false"): true;
+			case EParent(e): isBool(e);
+			default: false;
+		}
+	}
+
 	static function isNumber(e:Expr):Bool {
 		return switch(Tools.expr(e)) {
 			case EConst(CInt(_)): true;
@@ -374,6 +382,15 @@ class Optimizer {
 		}
 	}
 
+	static function getBool(e:Expr):Bool {
+		return switch(Tools.expr(e)) {
+			case EIdent("true"): true;
+			case EIdent("false"): true;
+			case EParent(e): getBool(e);
+			default: throw "Unknown type " + Tools.expr(e);
+		}
+	}
+
 	static function getStringConstant(e:Expr):String {
 		return switch(Tools.expr(e)) {
 			case EConst(CString(value)): value;
diff --git a/tests/src/tests/FinalCase.hx b/tests/src/tests/FinalCase.hx
index 581f803..ac99a91 100644
--- a/tests/src/tests/FinalCase.hx
+++ b/tests/src/tests/FinalCase.hx
@@ -52,6 +52,9 @@ class FinalCase extends TestCase {
 		assertEq("TestEnum.C(1, 2)", TestEnum.C(1, 2));
 		assertEq("TestEnum.D(1, 2, 3)", TestEnum.D(1, 2, 3));
 
+		Util.parse('test ? 0xFF343434 : 0xFF92A2FF');
+		Util.parse('test ? 1 : 0.75;');
+
 		// Test EOF with preprocessor
 	}