diff --git a/arch/arm64/src/cmake/platform.cmake b/arch/arm64/src/cmake/platform.cmake
index 4d8304e2fc..a9439d5432 100644
--- a/arch/arm64/src/cmake/platform.cmake
+++ b/arch/arm64/src/cmake/platform.cmake
@@ -42,7 +42,7 @@ execute_process(
   OUTPUT_STRIP_TRAILING_WHITESPACE
   OUTPUT_VARIABLE extra_library)
 list(APPEND EXTRA_LIB ${extra_library})
-if(NOT CONFIG_LIBM)
+if(CONFIG_LIBM_TOOLCHAIN)
   execute_process(
     COMMAND ${CMAKE_C_COMPILER} ${CMAKE_C_FLAG_ARGS} ${NUTTX_EXTRA_FLAGS}
             --print-file-name=libm.a
diff --git a/arch/xtensa/src/cmake/platform.cmake b/arch/xtensa/src/cmake/platform.cmake
index 95e1a538a2..f9991c71af 100644
--- a/arch/xtensa/src/cmake/platform.cmake
+++ b/arch/xtensa/src/cmake/platform.cmake
@@ -42,7 +42,7 @@ execute_process(
   OUTPUT_STRIP_TRAILING_WHITESPACE
   OUTPUT_VARIABLE extra_library)
 list(APPEND EXTRA_LIB ${extra_library})
-if(NOT CONFIG_LIBM)
+if(CONFIG_LIBM_TOOLCHAIN)
   execute_process(
     COMMAND ${CMAKE_C_COMPILER} ${CMAKE_C_FLAG_ARGS} ${NUTTX_EXTRA_FLAGS}
             --print-file-name=libm.a