diff --git a/linuxcnc-rs274-wasm-source-files.txt b/linuxcnc-rs274-wasm-source-files.txt
index e1694b1..4c9c4a5 100644
--- a/linuxcnc-rs274-wasm-source-files.txt
+++ b/linuxcnc-rs274-wasm-source-files.txt
@@ -58,11 +58,14 @@ header:src/emc/nml_intf/emc_nml.hh:LinuxCNC EMC NML aggregate declarations used
 header:src/libnml/nml/nmlmsg.hh:LinuxCNC NML message declarations used by wasm-safe NMLmsg constructor shim
 header:src/libnml/nml/stat_msg.hh:LinuxCNC status message declarations used by wasm-safe RCS_STAT_MSG constructor shim
 header:src/libnml/rcs/rcs_print.hh:LinuxCNC RCS print declarations used by wasm-safe NML status diagnostics
+header:src/rtapi/rtapi.h:LinuxCNC RTAPI snprintf declarations used by wasm-safe RTAPI compatibility shim
+header:src/rtapi/rtapi_string.h:LinuxCNC RTAPI string helpers used by RS274 and RCS print sources
 metadata:src/emc/rs274ngc/Submakefile:LinuxCNC rs274 make build metadata tracked for full directory coverage
 metadata:src/emc/rs274ngc/meson.build:LinuxCNC rs274 meson build metadata tracked for full directory coverage
 metadata:src/emc/ini/Submakefile:LinuxCNC ini build metadata defining liblinuxcncini source and exported headers
 metadata:src/libnml/nml/stat_msg.cc:source basis for wasm-safe RCS_STAT_MSG constructor shim
 metadata:src/libnml/nml/nmlmsg.cc:source basis for wasm-safe NMLmsg constructor shim
 metadata:src/libnml/rcs/rcs_print.cc:source basis for wasm-safe RCS print diagnostic shim
+metadata:src/rtapi/uspace_common.h:source basis for wasm-safe RTAPI snprintf compatibility shim
 metadata:src/emc/tooldata/tooldata_db.cc:source basis for wasm-safe tooldata runtime export shim
 metadata:src/emc/tooldata/tooldata_nml.cc:source basis for wasm-safe tooldata runtime NML export shim
diff --git a/test-native.sh b/test-native.sh
index c9b293e..b36804d 100755
--- a/test-native.sh
+++ b/test-native.sh
@@ -60,6 +60,9 @@ grep -F 'header:src/libnml/nml/nmlmsg.hh:LinuxCNC NML message declarations used
 grep -F 'header:src/libnml/nml/stat_msg.hh:LinuxCNC status message declarations used by wasm-safe RCS_STAT_MSG constructor shim' linuxcnc-rs274-wasm-source-files.txt >/dev/null
 grep -F 'header:src/libnml/rcs/rcs_print.hh:LinuxCNC RCS print declarations used by wasm-safe NML status diagnostics' linuxcnc-rs274-wasm-source-files.txt >/dev/null
 grep -F 'metadata:src/libnml/rcs/rcs_print.cc:source basis for wasm-safe RCS print diagnostic shim' linuxcnc-rs274-wasm-source-files.txt >/dev/null
+grep -F 'header:src/rtapi/rtapi.h:LinuxCNC RTAPI snprintf declarations used by wasm-safe RTAPI compatibility shim' linuxcnc-rs274-wasm-source-files.txt >/dev/null
+grep -F 'header:src/rtapi/rtapi_string.h:LinuxCNC RTAPI string helpers used by RS274 and RCS print sources' linuxcnc-rs274-wasm-source-files.txt >/dev/null
+grep -F 'metadata:src/rtapi/uspace_common.h:source basis for wasm-safe RTAPI snprintf compatibility shim' linuxcnc-rs274-wasm-source-files.txt >/dev/null
 grep -F 'metadata:src/emc/nml_intf/emcops.cc:source basis for native source-link EMC status constructor support object' linuxcnc-rs274-source-files.txt >/dev/null
 grep -F 'metadata:src/emc/sai/dummyemcstat.cc:source basis for native source-link emcStatus singleton support object' linuxcnc-rs274-source-files.txt >/dev/null
 grep -F 'metadata:src/emc/sai/Submakefile:LinuxCNC SAI build metadata defining dummyemcstat support object' linuxcnc-rs274-source-files.txt >/dev/null