diff --git a/apps/plugins/alpine_cdc.c b/apps/plugins/alpine_cdc.c
index 3290d5e851..bf8bfeaae1 100644
--- a/apps/plugins/alpine_cdc.c
+++ b/apps/plugins/alpine_cdc.c
@@ -490,16 +490,16 @@ void receive_timeout_isr(void)
 /* generate the checksum */
 unsigned char calc_checksum(unsigned char* p_msg, int digits)
 {
-	int chk = 0;
-	int i;
-	
-	for (i=0; i<digits; i++)
-	{
-		chk ^= p_msg[i];
-	}
-	chk = (chk+1) % 16;
-	
-	return chk;
+    int chk = 0;
+    int i;
+    
+    for (i=0; i<digits; i++)
+    {
+        chk ^= p_msg[i];
+    }
+    chk = (chk+1) % 16;
+    
+    return chk;
 }
 
 
diff --git a/apps/plugins/disktidy.c b/apps/plugins/disktidy.c
index d42a62d469..366d4381a6 100644
--- a/apps/plugins/disktidy.c
+++ b/apps/plugins/disktidy.c
@@ -554,9 +554,9 @@ static bool save_config(const char *file_name)
     {
         for (i=0; i<tidy_type_count; i++)
         {
-	    rb->fdprintf(fd, "%s%s: %s\n", tidy_types[i].filestring,
-	                 tidy_types[i].directory ? "/" : "",
-	                 tidy_types[i].remove ? "yes" : "no");
+        rb->fdprintf(fd, "%s%s: %s\n", tidy_types[i].filestring,
+                     tidy_types[i].directory ? "/" : "",
+                     tidy_types[i].remove ? "yes" : "no");
         }
         rb->close(fd);
     }
diff --git a/apps/plugins/resistor.c b/apps/plugins/resistor.c
index 87f6cfcb82..a0bd94911a 100644
--- a/apps/plugins/resistor.c
+++ b/apps/plugins/resistor.c
@@ -205,7 +205,7 @@ static enum color get_band_rtoc(int in_val)
 
 static char *get_tolerance_str(enum color color)
 {
-    static char tolerance_str [14];	
+    static char tolerance_str [14];
     rb->snprintf(tolerance_str, sizeof(tolerance_str), "%d%% tolerance",
                  band_data[color].tolerance);
     return tolerance_str;