diff --git a/modules/mbedtls/CMakeLists.txt b/modules/mbedtls/CMakeLists.txt
index c31d72fba5f..1717e2f991d 100644
--- a/modules/mbedtls/CMakeLists.txt
+++ b/modules/mbedtls/CMakeLists.txt
@@ -3,8 +3,8 @@ zephyr_interface_library_named(mbedTLS)
 
 if(CONFIG_MBEDTLS_BUILTIN)
   target_compile_definitions(mbedTLS INTERFACE
-	  MBEDTLS_CONFIG_FILE="${CONFIG_MBEDTLS_CFG_FILE}"
-	)
+    MBEDTLS_CONFIG_FILE="${CONFIG_MBEDTLS_CFG_FILE}"
+  )
 
   target_include_directories(mbedTLS INTERFACE
     ${ZEPHYR_CURRENT_MODULE_DIR}/include
@@ -14,7 +14,7 @@ if(CONFIG_MBEDTLS_BUILTIN)
     # and if so remove this include path.
     ${ZEPHYR_CURRENT_MODULE_DIR}/library
     configs
-	)
+  )
 
   zephyr_library()
 
@@ -57,8 +57,8 @@ elseif (CONFIG_MBEDTLS_LIBRARY)
   # therefore susceptible to bit rot
 
   target_include_directories(mbedTLS INTERFACE
-	${CONFIG_MBEDTLS_INSTALL_PATH}
-	)
+    ${CONFIG_MBEDTLS_INSTALL_PATH}
+  )
 
   zephyr_link_libraries(
     mbedtls_external