diff --git a/src/config_format/flb_config_format.c b/src/config_format/flb_config_format.c
index 3a62fc9e219..5ba15b85906 100644
--- a/src/config_format/flb_config_format.c
+++ b/src/config_format/flb_config_format.c
@@ -524,8 +524,8 @@ struct flb_cf_group *flb_cf_group_create(struct flb_cf *cf, struct flb_cf_sectio
     /* initialize lists */
     g->properties = cfl_kvlist_create();
     if (g->properties == NULL) {
-	flb_free(g);
-	return NULL;
+        flb_free(g);
+        return NULL;
     }
 
     /* determinate type by name */
diff --git a/src/flb_http_client.c b/src/flb_http_client.c
index 404df849a3a..c82fcba003c 100644
--- a/src/flb_http_client.c
+++ b/src/flb_http_client.c
@@ -478,7 +478,7 @@ static int process_data(struct flb_http_client *c)
 #if defined FLB_HAVE_TESTS_OSSFUZZ
 int fuzz_process_data(struct flb_http_client *c);
 int fuzz_process_data(struct flb_http_client *c) {
-	return process_data(c);
+    return process_data(c);
 }
 
 int fuzz_check_connection(struct flb_http_client *c);
diff --git a/src/flb_input_chunk.c b/src/flb_input_chunk.c
index 754e0e65993..e60f872c2ff 100644
--- a/src/flb_input_chunk.c
+++ b/src/flb_input_chunk.c
@@ -18,10 +18,10 @@
  */
 
 #define FS_CHUNK_SIZE_DEBUG(op)  {flb_trace("[%d] %s -> fs_chunks_size = %zu", \
-	__LINE__, op->name, op->fs_chunks_size);}
+    __LINE__, op->name, op->fs_chunks_size);}
 #define FS_CHUNK_SIZE_DEBUG_MOD(op, chunk, mod)  {flb_trace( \
-	"[%d] %s -> fs_chunks_size = %zu mod=%zd chunk=%s", __LINE__, \
-	op->name, op->fs_chunks_size, mod, flb_input_chunk_get_name(chunk));}
+    "[%d] %s -> fs_chunks_size = %zu mod=%zd chunk=%s", __LINE__, \
+    op->name, op->fs_chunks_size, mod, flb_input_chunk_get_name(chunk));}
 
 #include <fluent-bit/flb_info.h>
 #include <fluent-bit/flb_config.h>
@@ -507,7 +507,7 @@ int flb_input_chunk_has_overlimit_routes(struct flb_input_chunk *ic,
  */
 int flb_input_chunk_place_new_chunk(struct flb_input_chunk *ic, size_t chunk_size)
 {
-	int overlimit;
+    int overlimit;
     struct flb_input_instance *i_ins = ic->in;
 
     if (i_ins->storage_type == CIO_STORE_FS) {