diff --git a/org.jacoco.core/src/org/jacoco/core/data/ExecutionDataReader.java b/org.jacoco.core/src/org/jacoco/core/data/ExecutionDataReader.java
index b1bf9d2..33bd001 100644
--- a/org.jacoco.core/src/org/jacoco/core/data/ExecutionDataReader.java
+++ b/org.jacoco.core/src/org/jacoco/core/data/ExecutionDataReader.java
@@ -84,9 +84,8 @@
 		}
 		final char version = in.readChar();
 		if (version != ExecutionDataWriter.FORMAT_VERSION) {
-			throw new IOException(String
-					.format("Incompatible format version %x.", Integer
-							.valueOf(version)));
+			throw new IOException(format("Incompatible format version %x.",
+					Integer.valueOf(version)));
 		}
 	}