diff --git a/README.md b/README.md
index 700d34e..25805ad 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ cmake --preset atmega328p-generated
 cmake --build --preset atmega328p-generated
 ```
 
-The firmware is **8380 B** of flash, byte-identical between the generated and
+The firmware is **8382 B** of flash, byte-identical between the generated and
 reflect modes, and `ctest` holds it to that number.
 
 ## Atmel Studio
diff --git a/libavr b/libavr
index 43fc479..aec9955 160000
--- a/libavr
+++ b/libavr
@@ -1 +1 @@
-Subproject commit 43fc4796c2670e522233bd95a982a688052b9cf3
+Subproject commit aec9955ad390bb0888eea4f0c21ea7936c7e879f
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 03b99c5..6b5bff8 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -2,7 +2,7 @@ libavr_format_test()
 
 # The image must stay below the boot section at 0x7e00, and the README states
 # what it measures; a library advance that moves it says nothing on its own.
-libavr_size_claim_test(fantemp 8380)
+libavr_size_claim_test(fantemp 8382)
 
 # The README says the two modes emit the same image, and only a tree with
 # both built can say whether they do.