diff --git a/lib/compiler/passes/report-infinite-loops.js b/lib/compiler/passes/report-infinite-loops.js
index 766df22..cf8bf29 100644
--- a/lib/compiler/passes/report-infinite-loops.js
+++ b/lib/compiler/passes/report-infinite-loops.js
@@ -13,7 +13,7 @@ function reportInfiniteLoops(ast) {
     zero_or_more: function(node) {
       if (!asts.alwaysConsumesOnSuccess(ast, node.expression)) {
         throw new GrammarError(
-          "Possible infinite loop when parsing (repetition used with with an expression that may not consume any input).",
+          "Possible infinite loop when parsing (repetition used with an expression that may not consume any input).",
           node.location
         );
       }
@@ -22,7 +22,7 @@ function reportInfiniteLoops(ast) {
     one_or_more: function(node) {
       if (!asts.alwaysConsumesOnSuccess(ast, node.expression)) {
         throw new GrammarError(
-          "Possible infinite loop when parsing (repetition used with with an expression that may not consume any input).",
+          "Possible infinite loop when parsing (repetition used with an expression that may not consume any input).",
           node.location
         );
       }
diff --git a/spec/unit/compiler/passes/report-infinite-loops.spec.js b/spec/unit/compiler/passes/report-infinite-loops.spec.js
index 9339d05..4ebce04 100644
--- a/spec/unit/compiler/passes/report-infinite-loops.spec.js
+++ b/spec/unit/compiler/passes/report-infinite-loops.spec.js
@@ -7,7 +7,7 @@ describe("compiler pass |reportInfiniteLoops|", function() {
 
   it("reports infinite loops for zero_or_more", function() {
     expect(pass).toReportError('start = ("")*', {
-      message:  "Possible infinite loop when parsing (repetition used with with an expression that may not consume any input).",
+      message:  "Possible infinite loop when parsing (repetition used with an expression that may not consume any input).",
       location: {
         start: { offset:  8, line: 1, column:  9 },
         end:   { offset: 13, line: 1, column: 14 }
@@ -17,7 +17,7 @@ describe("compiler pass |reportInfiniteLoops|", function() {
 
   it("reports infinite loops for one_or_more", function() {
     expect(pass).toReportError('start = ("")+', {
-      message:  "Possible infinite loop when parsing (repetition used with with an expression that may not consume any input).",
+      message:  "Possible infinite loop when parsing (repetition used with an expression that may not consume any input).",
       location: {
         start: { offset:  8, line: 1, column:  9 },
         end:   { offset: 13, line: 1, column: 14 }