diff --git a/test/differential_rounding/DifferentialRoundingTest.cpp b/test/differential_rounding/DifferentialRoundingTest.cpp
index fd454839..d499dae7 100644
--- a/test/differential_rounding/DifferentialRoundingTest.cpp
+++ b/test/differential_rounding/DifferentialRoundingTest.cpp
@@ -94,6 +94,8 @@ static const EpdFontData kTestFontData = {
   .kernRightClassCount = 2,
   .ligaturePairs     = nullptr,
   .ligaturePairCount = 0,
+  .glyphMissHandler  = nullptr,
+  .glyphMissCtx      = nullptr,
 };
 // clang-format on