diff --git a/scripts/west_commands/sign.py b/scripts/west_commands/sign.py
index 8bc3154dcd7..c6fa273138e 100644
--- a/scripts/west_commands/sign.py
+++ b/scripts/west_commands/sign.py
@@ -685,8 +685,8 @@ class CommanderSigner(Signer):
     def get_input_output(command, build_dir, build_conf):
         kernel_prefix = (pathlib.Path(build_dir) / 'zephyr' /
                          build_conf.get('CONFIG_KERNEL_BIN_NAME', "zephyr"))
-        in_file = f'{kernel_prefix}.bin.rps'
-        out_file = command.args.sbin or f'{kernel_prefix}.signed.bin.rps'
+        in_file = f'{kernel_prefix}.rps'
+        out_file = command.args.sbin or f'{kernel_prefix}.signed.rps'
         return (in_file, out_file)
 
     def sign(self, command, build_dir, build_conf, formats):
diff --git a/soc/silabs/silabs_siwx91x/CMakeLists.txt b/soc/silabs/silabs_siwx91x/CMakeLists.txt
index 8ec7c16aef2..f1e6e5e6255 100644
--- a/soc/silabs/silabs_siwx91x/CMakeLists.txt
+++ b/soc/silabs/silabs_siwx91x/CMakeLists.txt
@@ -11,7 +11,7 @@ set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
     COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/siwx91x_isp_prepare.py
     --load-addr ${FLASH_LOAD_ADDRESS}
     ${KERNEL_BIN_NAME}
-    ${KERNEL_BIN_NAME}.rps
+    ${KERNEL_NAME}.rps
 )
 
 # runners_yaml_props_target controls the file used by "west flash"
@@ -21,10 +21,10 @@ if(CONFIG_SIWX91X_SIGN_KEY OR CONFIG_SIWX91X_MIC_KEY)
     ${WEST} sign -t silabs_commander --build-dir ${CMAKE_BINARY_DIR}
   )
   set_target_properties(runners_yaml_props_target
-    PROPERTIES bin_file ${PROJECT_BINARY_DIR}/${KERNEL_NAME}.signed.bin.rps
+    PROPERTIES bin_file ${PROJECT_BINARY_DIR}/${KERNEL_NAME}.signed.rps
   )
 else()
   set_target_properties(runners_yaml_props_target
-    PROPERTIES bin_file ${PROJECT_BINARY_DIR}/${KERNEL_BIN_NAME}.rps
+    PROPERTIES bin_file ${PROJECT_BINARY_DIR}/${KERNEL_NAME}.rps
   )
 endif()