diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
index 65cd308835..29e6868e15 100644
--- a/.git-blame-ignore-revs
+++ b/.git-blame-ignore-revs
@@ -7,4 +7,4 @@
 # initial clang-format run
 2a24ae77ab94f4c06b102eba73feb52e2f90cb46
 # clang-format run 17-Mar-2024
-36182929aec96dcf478495be00bd1b137a927847
+84f58b85aef7a7844f0d3bfb1301e778eb22e42c
diff --git a/src/lib/OpenEXRCore/internal_dwa_compressor.h b/src/lib/OpenEXRCore/internal_dwa_compressor.h
index 705a036c59..f96d22b377 100644
--- a/src/lib/OpenEXRCore/internal_dwa_compressor.h
+++ b/src/lib/OpenEXRCore/internal_dwa_compressor.h
@@ -1600,7 +1600,7 @@ DwaCompressor_classifyChannels (DwaCompressor* me)
             prefixMap,
             me->_numChannels,
             curc->channel_name,
-            (size_t) (curc->channel_name - suffix));
+            (size_t) (suffix - curc->channel_name));
 
         for (size_t i = 0; i < me->_channelRuleCount; ++i)
         {