diff --git a/tools/pr-build.sh b/tools/pr-build.sh
index 16827c6f..c1940101 100644
--- a/tools/pr-build.sh
+++ b/tools/pr-build.sh
@@ -15,7 +15,7 @@ cat user_config.h
 
 cd "$TRAVIS_BUILD_DIR"/ld || exit
 # increase irom0_0_seg size for all modules build
-sed -E -i.bak 's@(.*irom0_0_seg *:.*len *=) *[^,]*(.*)@\1 0xA0000\2@' nodemcu.ld
+sed -E -i.bak 's@(.*irom0_0_seg *:.*len *=) *[^,]*(.*)@\1 0xC0000\2@' nodemcu.ld
 cat nodemcu.ld
 
 # change to "root" directory no matter where the script was started from