diff --git a/tests/PDFPrimitivesTest.cpp b/tests/PDFPrimitivesTest.cpp
index f206062..d1ed217 100644
--- a/tests/PDFPrimitivesTest.cpp
+++ b/tests/PDFPrimitivesTest.cpp
@@ -276,8 +276,8 @@
                       strlen(expectedResult), false, false);
 
     // Test that we correctly handle characters with the high-bit set.
-    char highBitCString[] = {0xDE, 0xAD, 'b', 'e', 0xEF, 0};
-    SkRefPtr<SkPDFName> highBitName = new SkPDFName(highBitCString);
+    const unsigned char highBitCString[] = {0xDE, 0xAD, 'b', 'e', 0xEF, 0};
+    SkRefPtr<SkPDFName> highBitName = new SkPDFName((const char*)highBitCString);
     highBitName->unref();  // SkRefPtr and new both took a reference.
     const char highBitExpectedResult[] = "/#DE#ADbe#EF";
     CheckObjectOutput(reporter, highBitName.get(), highBitExpectedResult,