diff --git a/core/string/string_name.cpp b/core/string/string_name.cpp
index 658297d805f..5d59d65f92f 100644
--- a/core/string/string_name.cpp
+++ b/core/string/string_name.cpp
@@ -39,19 +39,10 @@ StaticCString StaticCString::create(const char *p_ptr) {
 	return scs;
 }
 
-StringName::_Data *StringName::_table[STRING_TABLE_LEN];
-
 StringName _scs_create(const char *p_chr, bool p_static) {
 	return (p_chr[0] ? StringName(StaticCString::create(p_chr), p_static) : StringName());
 }
 
-bool StringName::configured = false;
-Mutex StringName::mutex;
-
-#ifdef DEBUG_ENABLED
-bool StringName::debug_stringname = false;
-#endif
-
 void StringName::setup() {
 	ERR_FAIL_COND(configured);
 	for (int i = 0; i < STRING_TABLE_LEN; i++) {
diff --git a/core/string/string_name.h b/core/string/string_name.h
index 89b4c07e0e8..0eb98cf64b5 100644
--- a/core/string/string_name.h
+++ b/core/string/string_name.h
@@ -67,7 +67,7 @@ class StringName {
 		_Data() {}
 	};
 
-	static _Data *_table[STRING_TABLE_LEN];
+	static inline _Data *_table[STRING_TABLE_LEN];
 
 	_Data *_data = nullptr;
 
@@ -75,10 +75,10 @@ class StringName {
 	friend void register_core_types();
 	friend void unregister_core_types();
 	friend class Main;
-	static Mutex mutex;
+	static inline Mutex mutex;
 	static void setup();
 	static void cleanup();
-	static bool configured;
+	static inline bool configured = false;
 #ifdef DEBUG_ENABLED
 	struct DebugSortReferences {
 		bool operator()(const _Data *p_left, const _Data *p_right) const {
@@ -86,7 +86,7 @@ class StringName {
 		}
 	};
 
-	static bool debug_stringname;
+	static inline bool debug_stringname = false;
 #endif
 
 	StringName(_Data *p_data) { _data = p_data; }