diff --git a/pitest/src/main/java/org/pitest/classinfo/ComputeClassWriter.java b/pitest/src/main/java/org/pitest/classinfo/ComputeClassWriter.java
index 2b6774fb2..913eb522f 100644
--- a/pitest/src/main/java/org/pitest/classinfo/ComputeClassWriter.java
+++ b/pitest/src/main/java/org/pitest/classinfo/ComputeClassWriter.java
@@ -187,7 +187,7 @@ private boolean typeImplements(String type, ClassReader info, final String itf)
   private ClassReader typeInfo(final String type) {
     final Optional<byte[]> maybeBytes = this.bytes.getBytes(type);
     if (!maybeBytes.isPresent()) {
-      throw new PitError("Could not find class defintiion for " + type);
+      throw new PitError("Could not find class definition for " + type);
     }
     return new ClassReader(maybeBytes.get());
   }