diff --git a/version.h b/version.h
index 07c23c93a8..7dfea6f354 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 24
+#define RUBY_PATCHLEVEL 25
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"
diff --git a/weakmap.c b/weakmap.c
index f8a6ae3747..2ebf7d204f 100644
--- a/weakmap.c
+++ b/weakmap.c
@@ -859,7 +859,7 @@ wkmap_aset(VALUE self, VALUE key, VALUE val)
     TypedData_Get_Struct(self, struct weakkeymap, &weakkeymap_type, w);
 
     if (!FL_ABLE(key) || SYMBOL_P(key) || RB_BIGNUM_TYPE_P(key) || RB_TYPE_P(key, T_FLOAT)) {
-        rb_raise(rb_eArgError, "WeakKeyMap must be garbage collectable");
+        rb_raise(rb_eArgError, "WeakKeyMap keys must be garbage collectable");
         UNREACHABLE_RETURN(Qnil);
     }