diff --git a/Source/Core/DiscIO/VolumeGC.h b/Source/Core/DiscIO/VolumeGC.h
index ab424c6c50..10e5bf9df7 100644
--- a/Source/Core/DiscIO/VolumeGC.h
+++ b/Source/Core/DiscIO/VolumeGC.h
@@ -16,6 +16,7 @@
 
 namespace DiscIO
 {
+class IBlobReader;
 enum class BlobType;
 enum class Country;
 enum class Language;
diff --git a/Source/Core/DiscIO/VolumeWiiCrypted.h b/Source/Core/DiscIO/VolumeWiiCrypted.h
index 93c289cc43..7d8943ea8a 100644
--- a/Source/Core/DiscIO/VolumeWiiCrypted.h
+++ b/Source/Core/DiscIO/VolumeWiiCrypted.h
@@ -17,6 +17,7 @@
 
 namespace DiscIO
 {
+class IBlobReader;
 enum class BlobType;
 enum class Country;
 enum class Language;