diff --git a/tools/mocks/freertos/CMakeLists.txt b/tools/mocks/freertos/CMakeLists.txt
index ac4c116a44..ce6111260a 100644
--- a/tools/mocks/freertos/CMakeLists.txt
+++ b/tools/mocks/freertos/CMakeLists.txt
@@ -14,7 +14,8 @@ set(include_dirs
     "${original_freertos_dir}/esp_additions/include"
     # Required because CMock tries to include "idf_additions.h" instead of "freertos/idf_additions.h"
     "${original_freertos_dir}/esp_additions/include/freertos"
-    "${kernel_dir}/portable/linux/include" # For "freertos/portmacro.h"
+    "${kernel_dir}/portable/linux/include" # For "spinlock.h"
+    "${kernel_dir}/portable/linux/include/freertos" # For "portmacro.h"
     "${kernel_dir}/include/freertos" # this is due to the way includes are generated in CMock (without freertos prefix)
 )
 
diff --git a/tools/mocks/freertos/Kconfig b/tools/mocks/freertos/Kconfig
index d65bf47cc9..062e79e83b 100644
--- a/tools/mocks/freertos/Kconfig
+++ b/tools/mocks/freertos/Kconfig
@@ -37,4 +37,12 @@ menu "FreeRTOS"
         hex
         default 0x7FFFFFFF if !FREERTOS_SMP
         default 0xFFFFFFFF if FREERTOS_SMP
+
+    config FREERTOS_UNICORE
+        # This invisible config ensures that ESP-IDF components are always built as single-core
+        # when building for CMock. CMock is currently only supported on the Linux target, and the
+        # Linux FreeRTOS port supports single-core only.
+        bool
+        default y
+
 endmenu