diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3ab4ef394cc..b31321c719f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -951,10 +951,9 @@ if(CONFIG_ARM AND CONFIG_USERSPACE)
   set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS_OUTPUT_SRC}
     PROPERTIES COMPILE_DEFINITIONS "${compile_definitions_interface}")
 
-  # always compile priv_stacks_hash.c at optimization -Os
   set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${PRIV_STACKS_OUTPUT_SRC}
     PROPERTIES COMPILE_FLAGS
-    "${NO_COVERAGE_FLAGS} -Os -fno-function-sections -fno-data-sections ")
+    "${NO_COVERAGE_FLAGS} -fno-function-sections -fno-data-sections ")
 
   # We need precise control of where generated text/data ends up in the final
   # kernel image. Disable function/data sections and use objcopy to move
@@ -1075,9 +1074,8 @@ if(CONFIG_USERSPACE)
     ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_SRC}
     )
 
-  # always compile kobject_hash.c at optimization -Os
   set_source_files_properties(${OUTPUT_SRC} PROPERTIES COMPILE_FLAGS
-    "${NO_COVERAGE_FLAGS} -Os -fno-function-sections -fno-data-sections")
+    "${NO_COVERAGE_FLAGS} -fno-function-sections -fno-data-sections")
 
   set_source_files_properties(${OUTPUT_SRC}
     PROPERTIES COMPILE_DEFINITIONS "${compile_definitions_interface}")