diff --git a/demos/RP/RT-RP2040-PICO/Makefile b/demos/RP/RT-RP2040-PICO/Makefile
index 9fbbe4da2..adcba82aa 100644
--- a/demos/RP/RT-RP2040-PICO/Makefile
+++ b/demos/RP/RT-RP2040-PICO/Makefile
@@ -123,7 +123,6 @@ LDSCRIPT= $(STARTUPLD)/RP2040_RAM.ld
 # setting.
 CSRC = $(ALLCSRC) \
        $(TESTSRC) \
-       $(CHIBIOS)/os/various/syscalls.c \
        main.c c1_main.c
 
 # C++ sources that can be compiled in ARM or THUMB mode depending on the global
@@ -154,7 +153,7 @@ CPPWARN = -Wall -Wextra -Wundef
 #
 
 # List all user C define here, like -D_DEBUG=1
-UDEFS = -DCRT0_VTOR_INIT=1 -DCRT0_EXTRA_CORES_NUMBER=1 -DPICO_NO_FPGA_CHECK
+UDEFS = -DCRT0_VTOR_INIT=1 -DCRT0_EXTRA_CORES_NUMBER=1 -DPICO_NO_FPGA_CHECK -DNDEBUG
 
 # Define ASM defines here
 UADEFS = -DCRT0_VTOR_INIT=1 -DCRT0_EXTRA_CORES_NUMBER=1