diff --git a/tools/pr-build.sh b/tools/pr-build.sh
index 361dd4ab..ef16696a 100644
--- a/tools/pr-build.sh
+++ b/tools/pr-build.sh
@@ -19,6 +19,11 @@ sed -E -i.bak 's@// ?#define DEVELOP_VERSION@#define DEVELOP_VERSION@' user_conf
 sed -i 's@//#define BUILD_FATFS@#define BUILD_FATFS@' user_config.h
 cat user_config.h
 
+cd "$TRAVIS_BUILD_DIR"/ld || exit
+ # increase irom0_0_seg size for all modules build
+ sed -E -i.bak 's@(.*irom0_0_seg *:.*len *=) *[^,]*(.*)@\1 0x200000\2@' nodemcu.ld
+ cat nodemcu.ld
+
 # change to "root" directory no matter where the script was started from
 cd "$TRAVIS_BUILD_DIR" || exit
 make clean