diff --git a/src/librvth/rvth.hpp b/src/librvth/rvth.hpp
index aed34f1..89ef1f4 100644
--- a/src/librvth/rvth.hpp
+++ b/src/librvth/rvth.hpp
@@ -163,7 +163,7 @@ typedef struct _RvtH_Verify_Progress_State {
 	// If RVTH_VERIFY_ERROR_REPORT, what type of error?
 	uint8_t hash_level;	// 0, 1, 2, 3, 4
 	uint8_t sector;		// Sector 0-63 in the current group
-	uint8_t kb;		// Kilobyte 0-31 (H0 only)
+	uint8_t kb;		// Kilobyte 1-31 (H0 only) [KB 0 == hashes]
 	uint8_t err_type;	// Error type (see RvtH_Verify_Error_Type)
 	bool is_zero;		// If true, sector is zeroed. (scrubbed/truncated)
 } RvtH_Verify_Progress_State;
diff --git a/src/librvth/verify.cpp b/src/librvth/verify.cpp
index 82ea874..cdb6670 100644
--- a/src/librvth/verify.cpp
+++ b/src/librvth/verify.cpp
@@ -567,7 +567,7 @@ int RvtH::verifyWiiPartitions(unsigned int bank,
 							state.type = RVTH_VERIFY_ERROR_REPORT;
 							state.hash_level = 0;
 							state.sector = sector;
-							state.kb = kb;
+							state.kb = kb+1;
 							state.err_type = RVTH_VERIFY_ERROR_BAD_HASH;
 							callback(&state, userdata);
 						}