diff --git a/src/commands.cc b/src/commands.cc
index d06f75b8..2523d0c0 100644
--- a/src/commands.cc
+++ b/src/commands.cc
@@ -832,7 +832,7 @@ const CommandDesc declare_option_cmd = {
         else if (parser[0] == "str")
             opt = &opts.declare_option<String>(parser[1], docstring, "", flags);
         else if (parser[0] == "regex")
-            opt = &opts.declare_option<Regex>(parser[1], docstring, {}, flags);
+            opt = &opts.declare_option<Regex>(parser[1], docstring, Regex{}, flags);
         else if (parser[0] == "int-list")
             opt = &opts.declare_option<std::vector<int>>(parser[1], docstring, {}, flags);
         else if (parser[0] == "str-list")
diff --git a/src/string.hh b/src/string.hh
index 954436e4..eb241e76 100644
--- a/src/string.hh
+++ b/src/string.hh
@@ -65,7 +65,7 @@ public:
     constexpr StringView() : m_data{nullptr}, m_length{0} {}
     constexpr StringView(const char* data, ByteCount length)
         : m_data{data}, m_length{length} {}
-    constexpr StringView(const char* data) : m_data{data}, m_length{(int)strlen(data)} {}
+    StringView(const char* data) : m_data{data}, m_length{(int)strlen(data)} {}
     constexpr StringView(const char* begin, const char* end) : m_data{begin}, m_length{(int)(end - begin)} {}
     StringView(const String& str) : m_data{str.data()}, m_length{str.length()} {}