diff --git a/lv_conf_template.h b/lv_conf_template.h
index bfb04988f..bacbfd8e0 100644
--- a/lv_conf_template.h
+++ b/lv_conf_template.h
@@ -113,12 +113,12 @@
     #define LV_OS_CUSTOM_INCLUDE <stdint.h>
 #endif
 #if LV_USE_OS == LV_OS_FREERTOS
-	/*
-	 * Unblocking an RTOS task with a direct notification is 45% faster and uses less RAM
-	 * than unblocking a task using an intermediary object such as a binary semaphore.
-	 * RTOS task notifications can only be used when there is only one task that can be the recipient of the event.
-	 */
-	#define LV_USE_FREERTOS_TASK_NOTIFY 1
+    /*
+     * Unblocking an RTOS task with a direct notification is 45% faster and uses less RAM
+     * than unblocking a task using an intermediary object such as a binary semaphore.
+     * RTOS task notifications can only be used when there is only one task that can be the recipient of the event.
+     */
+    #define LV_USE_FREERTOS_TASK_NOTIFY 1
 #endif
 
 /*========================
@@ -538,7 +538,7 @@
 #define LV_USE_MATRIX           0
 
 /** Include `lvgl_private.h` in `lvgl.h` to access internal data and functions by default */
-#define LV_USE_PRIVATE_API		0
+#define LV_USE_PRIVATE_API      0
 
 /*==================
  *   FONT USAGE
@@ -1102,7 +1102,7 @@
 #endif
 
 /** Enable loading XML UIs runtime */
-#define LV_USE_XML	0
+#define LV_USE_XML    0
 
 /*==================
  * DEVICES
@@ -1297,9 +1297,9 @@
 #define LV_USE_DEMO_VECTOR_GRAPHIC  0
 
 /*E-bike demo with Lottie animations (if LV_USE_LOTTIE is enabled)*/
-#define LV_USE_DEMO_EBIKE			0
+#define LV_USE_DEMO_EBIKE           0
 #if LV_USE_DEMO_EBIKE
-	#define LV_DEMO_EBIKE_PORTRAIT  0    /*0: for 480x270..480x320, 1: for 480x800..720x1280*/
+    #define LV_DEMO_EBIKE_PORTRAIT  0    /*0: for 480x270..480x320, 1: for 480x800..720x1280*/
 #endif
 
 /** High-resolution demo */
diff --git a/scripts/lv_conf_internal_gen.py b/scripts/lv_conf_internal_gen.py
index 94d6ef86a..0b52de09e 100755
--- a/scripts/lv_conf_internal_gen.py
+++ b/scripts/lv_conf_internal_gen.py
@@ -16,6 +16,22 @@ if sys.version_info < (3,6,0):
   print("Python >=3.6 is required", file=sys.stderr)
   exit(1)
 
+def check_for_tabs(file_path):
+    errors = []
+    with open(file_path, 'r') as file:
+        for line_number, line in enumerate(file, 1):
+            if '\t' in line:
+                errors.append(f" {file_path}:{line_number}")
+
+    if errors:
+        print(f"Tabs found in the following files:", file=sys.stderr)
+        for error in errors:
+            print(error, file=sys.stderr)
+        print("Please replace tabs with spaces.", file=sys.stderr)
+        exit(1)
+
+check_for_tabs(LV_CONF_TEMPLATE)
+
 fin = open(LV_CONF_TEMPLATE)
 fout = open(LV_CONF_INTERNAL, "w", newline='')
 
diff --git a/src/lv_conf_internal.h b/src/lv_conf_internal.h
index 3ed69a5ec..f0071467b 100644
--- a/src/lv_conf_internal.h
+++ b/src/lv_conf_internal.h
@@ -284,22 +284,22 @@
     #endif
 #endif
 #if LV_USE_OS == LV_OS_FREERTOS
-	/*
-	 * Unblocking an RTOS task with a direct notification is 45% faster and uses less RAM
-	 * than unblocking a task using an intermediary object such as a binary semaphore.
-	 * RTOS task notifications can only be used when there is only one task that can be the recipient of the event.
-	 */
-	#ifndef LV_USE_FREERTOS_TASK_NOTIFY
-	    #ifdef LV_KCONFIG_PRESENT
-	        #ifdef CONFIG_LV_USE_FREERTOS_TASK_NOTIFY
-	            #define LV_USE_FREERTOS_TASK_NOTIFY CONFIG_LV_USE_FREERTOS_TASK_NOTIFY
-	        #else
-	            #define LV_USE_FREERTOS_TASK_NOTIFY 0
-	        #endif
-	    #else
-	        #define LV_USE_FREERTOS_TASK_NOTIFY 1
-	    #endif
-	#endif
+    /*
+     * Unblocking an RTOS task with a direct notification is 45% faster and uses less RAM
+     * than unblocking a task using an intermediary object such as a binary semaphore.
+     * RTOS task notifications can only be used when there is only one task that can be the recipient of the event.
+     */
+    #ifndef LV_USE_FREERTOS_TASK_NOTIFY
+        #ifdef LV_KCONFIG_PRESENT
+            #ifdef CONFIG_LV_USE_FREERTOS_TASK_NOTIFY
+                #define LV_USE_FREERTOS_TASK_NOTIFY CONFIG_LV_USE_FREERTOS_TASK_NOTIFY
+            #else
+                #define LV_USE_FREERTOS_TASK_NOTIFY 0
+            #endif
+        #else
+            #define LV_USE_FREERTOS_TASK_NOTIFY 1
+        #endif
+    #endif
 #endif
 
 /*========================
@@ -1531,7 +1531,7 @@
     #ifdef CONFIG_LV_USE_PRIVATE_API
         #define LV_USE_PRIVATE_API CONFIG_LV_USE_PRIVATE_API
     #else
-        #define LV_USE_PRIVATE_API		0
+        #define LV_USE_PRIVATE_API      0
     #endif
 #endif
 
@@ -3507,7 +3507,7 @@
     #ifdef CONFIG_LV_USE_XML
         #define LV_USE_XML CONFIG_LV_USE_XML
     #else
-        #define LV_USE_XML	0
+        #define LV_USE_XML    0
     #endif
 #endif
 
@@ -4176,17 +4176,17 @@
     #ifdef CONFIG_LV_USE_DEMO_EBIKE
         #define LV_USE_DEMO_EBIKE CONFIG_LV_USE_DEMO_EBIKE
     #else
-        #define LV_USE_DEMO_EBIKE			0
+        #define LV_USE_DEMO_EBIKE           0
     #endif
 #endif
 #if LV_USE_DEMO_EBIKE
-	#ifndef LV_DEMO_EBIKE_PORTRAIT
-	    #ifdef CONFIG_LV_DEMO_EBIKE_PORTRAIT
-	        #define LV_DEMO_EBIKE_PORTRAIT CONFIG_LV_DEMO_EBIKE_PORTRAIT
-	    #else
-	        #define LV_DEMO_EBIKE_PORTRAIT  0    /*0: for 480x270..480x320, 1: for 480x800..720x1280*/
-	    #endif
-	#endif
+    #ifndef LV_DEMO_EBIKE_PORTRAIT
+        #ifdef CONFIG_LV_DEMO_EBIKE_PORTRAIT
+            #define LV_DEMO_EBIKE_PORTRAIT CONFIG_LV_DEMO_EBIKE_PORTRAIT
+        #else
+            #define LV_DEMO_EBIKE_PORTRAIT  0    /*0: for 480x270..480x320, 1: for 480x800..720x1280*/
+        #endif
+    #endif
 #endif
 
 /** High-resolution demo */