diff --git a/tests/gtest/avif_fuzztest_helpers.h b/tests/gtest/avif_fuzztest_helpers.h
index dc36c87..157b709 100644
--- a/tests/gtest/avif_fuzztest_helpers.h
+++ b/tests/gtest/avif_fuzztest_helpers.h
@@ -159,7 +159,7 @@
 }
 
 #if defined(AVIF_ENABLE_EXPERIMENTAL_GAIN_MAP)
-// Generator for an arbitrary EncoderPtr with base options and gain map
+// Generator for an arbitrary DecoderPtr with base options and gain map
 // options fuzzed, with the exception of 'ignoreColorAndAlpha' (because it would
 // break most tests' assumptions).
 inline auto ArbitraryAvifDecoderWithGainMapOptions() {