diff --git a/libaegisub/include/libaegisub/access.h b/libaegisub/include/libaegisub/access.h
index f956cc920..9916fa33e 100644
--- a/libaegisub/include/libaegisub/access.h
+++ b/libaegisub/include/libaegisub/access.h
@@ -24,9 +24,9 @@ enum Type {
 
 void Check(fs::path const& file, acs::Type);
 
-inline void CheckFileRead(fs::path const& file) { Check(file, acs::FileRead); }
-inline void CheckFileWrite(fs::path const& file) { Check(file, acs::FileWrite); }
+static inline void CheckFileRead(fs::path const& file) { Check(file, acs::FileRead); }
+static inline void CheckFileWrite(fs::path const& file) { Check(file, acs::FileWrite); }
 
-inline void CheckDirRead(fs::path const& dir) { Check(dir, acs::DirRead); }
-inline void CheckDirWrite(fs::path const& dir) { Check(dir, acs::DirWrite); }
+static inline void CheckDirRead(fs::path const& dir) { Check(dir, acs::DirRead); }
+static inline void CheckDirWrite(fs::path const& dir) { Check(dir, acs::DirWrite); }
 } }
diff --git a/libaegisub/include/libaegisub/fs.h b/libaegisub/include/libaegisub/fs.h
index 6dbeaf81b..e09711e93 100644
--- a/libaegisub/include/libaegisub/fs.h
+++ b/libaegisub/include/libaegisub/fs.h
@@ -166,8 +166,8 @@ namespace agi {
 			template<typename T> void GetAll(T& cont);
 		};
 
-		inline DirectoryIterator& begin(DirectoryIterator &it) { return it; }
-		inline DirectoryIterator end(DirectoryIterator &) { return DirectoryIterator(); }
+		static inline DirectoryIterator& begin(DirectoryIterator &it) { return it; }
+		static inline DirectoryIterator end(DirectoryIterator &) { return DirectoryIterator(); }
 
 		template<typename T>
 		inline void DirectoryIterator::GetAll(T& cont) {
diff --git a/libaegisub/include/libaegisub/split.h b/libaegisub/include/libaegisub/split.h
index 43cf0284c..b2f968cbf 100644
--- a/libaegisub/include/libaegisub/split.h
+++ b/libaegisub/include/libaegisub/split.h
@@ -25,7 +25,7 @@ namespace agi {
 		return boost::make_split_iterator(str, boost::token_finder([=](Char c) { return c == delim; }));
 	}
 
-	inline std::string str(StringRange const& r) {
+	static inline std::string str(StringRange const& r) {
 		return std::string(r.begin(), r.end());
 	}
 }
diff --git a/libaegisub/include/libaegisub/util.h b/libaegisub/include/libaegisub/util.h
index baeb1ab2e..3a5cd81e0 100644
--- a/libaegisub/include/libaegisub/util.h
+++ b/libaegisub/include/libaegisub/util.h
@@ -21,7 +21,10 @@ struct tm;
 namespace agi {
 	namespace util {
 	/// Clamp `b` to the range [`a`,`c`]
-	template<typename T> inline T mid(T a, T b, T c) { return std::max(a, std::min(b, c)); }
+	template<typename T>
+	static inline T mid(T a, T b, T c) {
+		return std::max(a, std::min(b, c));
+	}
 
 	bool try_parse(std::string const& str, double *out);
 	bool try_parse(std::string const& str, int *out);
diff --git a/src/compat.cpp b/src/compat.cpp
index 1892eaa30..62ac07f04 100644
--- a/src/compat.cpp
+++ b/src/compat.cpp
@@ -19,3 +19,19 @@ wxArrayString to_wx(std::vector<std::string> const& vec) {
 	transform(vec.begin(), vec.end(), std::back_inserter(ret), (wxString (*)(std::string const&))to_wx);
 	return ret;
 }
+
+wxColour to_wx(agi::Color color) {
+	return wxColour(color.r, color.g, color.b, 255 - color.a);
+}
+
+wxString to_wx(std::string const& str) {
+	return wxString(str.c_str(), wxConvUTF8);
+}
+
+agi::Color from_wx(wxColour color) {
+	return agi::Color(color.Red(), color.Green(), color.Blue(), 255 - color.Alpha());
+}
+
+std::string from_wx(wxString const& str) {
+	return std::string(str.utf8_str());
+}
diff --git a/src/compat.h b/src/compat.h
index f17a7bc4c..88c9c4b38 100644
--- a/src/compat.h
+++ b/src/compat.h
@@ -9,11 +9,11 @@
 
 #include <libaegisub/color.h>
 
-inline wxColour to_wx(agi::Color color) { return wxColour(color.r, color.g, color.b, 255 - color.a); }
-inline wxString to_wx(std::string const& str) { return wxString(str.c_str(), wxConvUTF8); }
+wxColour to_wx(agi::Color color);
+wxString to_wx(std::string const& str);
 wxArrayString to_wx(std::vector<std::string> const& vec);
 
-inline agi::Color from_wx(wxColour color) { return agi::Color(color.Red(), color.Green(), color.Blue(), 255 - color.Alpha()); }
-inline std::string from_wx(wxString const& str) { return std::string(str.utf8_str()); }
+agi::Color from_wx(wxColour color);
+std::string from_wx(wxString const& str);
 
 wxArrayString lagi_MRU_wxAS(const char *list);