diff --git a/StaticAnalyser/Acorn/Disk.cpp b/StaticAnalyser/Acorn/Disk.cpp
index f3dfa1074..d4023525e 100644
--- a/StaticAnalyser/Acorn/Disk.cpp
+++ b/StaticAnalyser/Acorn/Disk.cpp
@@ -134,7 +134,7 @@ class FMParser: public Storage::Disk::Drive {
 				return sector;
 			}
 
-			return sector;
+			return nullptr;
 		}
 
 		std::shared_ptr<Storage::Encodings::MFM::Sector> get_sector(uint8_t sector)