diff --git a/samples/arm-picolibc-eabi/crosstool.config b/samples/arm-picolibc-eabi/crosstool.config
index 72dcb07b..d08c882f 100644
--- a/samples/arm-picolibc-eabi/crosstool.config
+++ b/samples/arm-picolibc-eabi/crosstool.config
@@ -8,3 +8,7 @@ CT_LIBC_PICOLIBC=y
 CT_CC_GCC_MULTILIB_LIST="rmprofile"
 CT_CC_GCC_CONFIG_TLS=y
 CT_CC_LANG_CXX=y
+CT_LIBC_PICOLIBC_DEFAULT_FLASH_ADDR="0x00000000"
+CT_LIBC_PICOLIBC_DEFAULT_FLASH_SIZE="0x00400000"
+CT_LIBC_PICOLIBC_DEFAULT_RAM_ADDR="0x20000000"
+CT_LIBC_PICOLIBC_DEFAULT_RAM_SIZE="0x00200000"