diff --git a/src/main.cc b/src/main.cc
index dcc18a68..7102b853 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -269,18 +269,34 @@ void do_paste(Context& context)
 void do_select_regex(Context& context)
 {
     context.input_handler().prompt("select: ", complete_nothing,
-        [](const String& ex, PromptEvent event, Context& context) {
-            if (event == PromptEvent::Validate and not ex.empty())
-                context.editor().multi_select(std::bind(select_all_matches, _1, ex));
+        [](const String& str, PromptEvent event, Context& context) {
+            if (event == PromptEvent::Validate)
+            {
+                String ex = str;
+                if (ex.empty())
+                    ex = RegisterManager::instance()['/'].values(context)[0];
+                else
+                    RegisterManager::instance()['/'] = ex;
+                if (not ex.empty())
+                    context.editor().multi_select(std::bind(select_all_matches, _1, ex));
+            }
         });
 }
 
 void do_split_regex(Context& context)
 {
     context.input_handler().prompt("split: ", complete_nothing,
-        [](const String& ex, PromptEvent event, Context& context) {
-            if (event == PromptEvent::Validate and not ex.empty())
-                context.editor().multi_select(std::bind(split_selection, _1, ex));
+        [](const String& str, PromptEvent event, Context& context) {
+            if (event == PromptEvent::Validate)
+            {
+                String ex = str;
+                if (ex.empty())
+                    ex = RegisterManager::instance()['/'].values(context)[0];
+                else
+                    RegisterManager::instance()['/'] = ex;
+                if (not ex.empty())
+                    context.editor().multi_select(std::bind(split_selection, _1, ex));
+            }
         });
 }