diff --git a/unifill/Utf16.hx b/unifill/Utf16.hx
index 2acabdc..e1041c5 100644
--- a/unifill/Utf16.hx
+++ b/unifill/Utf16.hx
@@ -173,7 +173,7 @@ private class Utf16Impl {
 		return (!Unicode.isLowSurrogate(c)) ? 1 : 2;
 	}
 
-	public static function encode_code_point(addUnit : Int -> Void, codePoint : Int) : Void {
+	public static inline function encode_code_point(addUnit : Int -> Void, codePoint : Int) : Void {
 		if (codePoint <= 0xFFFF) {
 			addUnit(codePoint);
 		} else {
diff --git a/unifill/Utf8.hx b/unifill/Utf8.hx
index ba67640..ceed0bd 100644
--- a/unifill/Utf8.hx
+++ b/unifill/Utf8.hx
@@ -176,7 +176,7 @@ private class Utf8Impl {
 			: 1;
 	}
 
-	public static function encode_code_point(addUnit : Int -> Void, codePoint : Int) : Void {
+	public static inline function encode_code_point(addUnit : Int -> Void, codePoint : Int) : Void {
 		if (codePoint <= 0x7F) {
 			addUnit(codePoint);
 		} else if (codePoint <= 0x7FF) {