diff --git a/ext/io/wait/wait.c b/ext/io/wait/wait.c
index a82295f72e..bde65f9cf8 100644
--- a/ext/io/wait/wait.c
+++ b/ext/io/wait/wait.c
@@ -239,7 +239,7 @@ io_wait(int argc, VALUE *argv, VALUE io)
         }
     } else if (argc == 2) {
         events = RB_NUM2UINT(argv[0]);
-        
+
         if (argv[1] != Qnil) {
           timeout = argv[1];
         }
diff --git a/gc.c b/gc.c
index eff5486353..7f48f1d9b9 100644
--- a/gc.c
+++ b/gc.c
@@ -3395,7 +3395,7 @@ should_be_finalizable(VALUE obj)
  *        def initialize(data_needed_for_finalization)
  *          ObjectSpace.define_finalizer(self, self.class.create_finalizer(data_needed_for_finalization))
  *        end
- *      
+ *
  *        def self.create_finalizer(data_needed_for_finalization)
  *          proc {
  *            puts "finalizing #{data_needed_for_finalization}"
@@ -3408,7 +3408,7 @@ should_be_finalizable(VALUE obj)
  *          def initialize(data_needed_for_finalization)
  *            @data_needed_for_finalization = data_needed_for_finalization
  *          end
- *        
+ *
  *          def call(id)
  *            puts "finalizing #{@data_needed_for_finalization}"
  *          end
@@ -7739,7 +7739,7 @@ static inline void
 gc_enter(rb_objspace_t *objspace, const char *event, unsigned int *lock_lev)
 {
     // stop other ractors
-    
+
     RB_VM_LOCK_ENTER_LEV(lock_lev);
     rb_vm_barrier();
 
diff --git a/ractor.c b/ractor.c
index bccc88fa89..0ae0070b02 100644
--- a/ractor.c
+++ b/ractor.c
@@ -492,7 +492,7 @@ ractor_copy_setup(struct rb_ractor_basket *b, VALUE obj)
 #if 0
         // TODO: consider custom copy protocol
         switch (BUILTIN_TYPE(obj)) {
-            
+
         }
 #endif
         b->v = rb_marshal_dump(obj, Qnil);
@@ -1357,7 +1357,7 @@ ractor_atexit_yield(rb_execution_context_t *ec, rb_ractor_t *cr, VALUE v, bool e
 
     struct rb_ractor_basket basket;
     ractor_basket_setup(ec, &basket, v, Qfalse, exc);
- 
+
   retry:
     if (ractor_try_yield(ec, cr, &basket)) {
         // OK.