diff --git a/lib/compiler/passes/generate-javascript.js b/lib/compiler/passes/generate-javascript.js
index 206ed15..da54462 100644
--- a/lib/compiler/passes/generate-javascript.js
+++ b/lib/compiler/passes/generate-javascript.js
@@ -546,7 +546,7 @@ module.exports = function(ast, options) {
           case op.MATCH_STRING_IC:  // MATCH_STRING_IC s, a, f, ...
             compileCondition(
               'input.substr(peg$currPos, '
-                + ast.consts[bc[ip + 1]].length
+                + eval(ast.consts[bc[ip + 1]]).length
                 + ').toLowerCase() === '
                 + c(bc[ip + 1]),
               1