diff --git a/grpc.def b/grpc.def
index 54f9609bc2a..8b64b37ff34 100644
--- a/grpc.def
+++ b/grpc.def
@@ -142,6 +142,7 @@ EXPORTS
     grpc_server_credentials_set_auth_metadata_processor
     grpc_slice_ref
     grpc_slice_unref
+    grpc_slice_copy
     grpc_slice_new
     grpc_slice_new_with_user_data
     grpc_slice_new_with_len
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.c b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
index b6360f2d4c9..d11f7f6a78a 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.c
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.c
@@ -180,6 +180,7 @@ grpc_call_set_credentials_type grpc_call_set_credentials_import;
 grpc_server_credentials_set_auth_metadata_processor_type grpc_server_credentials_set_auth_metadata_processor_import;
 grpc_slice_ref_type grpc_slice_ref_import;
 grpc_slice_unref_type grpc_slice_unref_import;
+grpc_slice_copy_type grpc_slice_copy_import;
 grpc_slice_new_type grpc_slice_new_import;
 grpc_slice_new_with_user_data_type grpc_slice_new_with_user_data_import;
 grpc_slice_new_with_len_type grpc_slice_new_with_len_import;
@@ -481,6 +482,7 @@ void grpc_rb_load_imports(HMODULE library) {
   grpc_server_credentials_set_auth_metadata_processor_import = (grpc_server_credentials_set_auth_metadata_processor_type) GetProcAddress(library, "grpc_server_credentials_set_auth_metadata_processor");
   grpc_slice_ref_import = (grpc_slice_ref_type) GetProcAddress(library, "grpc_slice_ref");
   grpc_slice_unref_import = (grpc_slice_unref_type) GetProcAddress(library, "grpc_slice_unref");
+  grpc_slice_copy_import = (grpc_slice_copy_type) GetProcAddress(library, "grpc_slice_copy");
   grpc_slice_new_import = (grpc_slice_new_type) GetProcAddress(library, "grpc_slice_new");
   grpc_slice_new_with_user_data_import = (grpc_slice_new_with_user_data_type) GetProcAddress(library, "grpc_slice_new_with_user_data");
   grpc_slice_new_with_len_import = (grpc_slice_new_with_len_type) GetProcAddress(library, "grpc_slice_new_with_len");
diff --git a/src/ruby/ext/grpc/rb_grpc_imports.generated.h b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
index 539b7de9bd3..dc50b87baf2 100644
--- a/src/ruby/ext/grpc/rb_grpc_imports.generated.h
+++ b/src/ruby/ext/grpc/rb_grpc_imports.generated.h
@@ -491,6 +491,9 @@ extern grpc_slice_ref_type grpc_slice_ref_import;
 typedef void(*grpc_slice_unref_type)(grpc_slice s);
 extern grpc_slice_unref_type grpc_slice_unref_import;
 #define grpc_slice_unref grpc_slice_unref_import
+typedef grpc_slice(*grpc_slice_copy_type)(grpc_slice s);
+extern grpc_slice_copy_type grpc_slice_copy_import;
+#define grpc_slice_copy grpc_slice_copy_import
 typedef grpc_slice(*grpc_slice_new_type)(void *p, size_t len, void (*destroy)(void *));
 extern grpc_slice_new_type grpc_slice_new_import;
 #define grpc_slice_new grpc_slice_new_import
@@ -530,7 +533,7 @@ extern grpc_slice_sub_no_ref_type grpc_slice_sub_no_ref_import;
 typedef grpc_slice(*grpc_slice_split_tail_type)(grpc_slice *s, size_t split);
 extern grpc_slice_split_tail_type grpc_slice_split_tail_import;
 #define grpc_slice_split_tail grpc_slice_split_tail_import
-typedef grpc_slice(*grpc_slice_split_tail_maybe_ref_type)(grpc_slice *s, size_t split, int inc_refs);
+typedef grpc_slice(*grpc_slice_split_tail_maybe_ref_type)(grpc_slice *s, size_t split, grpc_slice_ref_whom ref_whom);
 extern grpc_slice_split_tail_maybe_ref_type grpc_slice_split_tail_maybe_ref_import;
 #define grpc_slice_split_tail_maybe_ref grpc_slice_split_tail_maybe_ref_import
 typedef grpc_slice(*grpc_slice_split_head_type)(grpc_slice *s, size_t split);