diff --git a/include/kiwi/ScriptType.h b/include/kiwi/ScriptType.h
index e6fdbcc7..cf47a932 100644
--- a/include/kiwi/ScriptType.h
+++ b/include/kiwi/ScriptType.h
@@ -246,5 +246,5 @@ namespace kiwi
      * 
      * @return 0 if the character is not an emoji, 1 if c0 is an emoji, 2 if c0 and c1 are combined to form an emoji.
      */
-    size_t isEmoji(char32_t c0, char32_t c1 = 0);
+    int isEmoji(char32_t c0, char32_t c1 = 0);
 }
diff --git a/src/ScriptType.cpp b/src/ScriptType.cpp
index b1e6db5d..7c23ca8a 100644
--- a/src/ScriptType.cpp
+++ b/src/ScriptType.cpp
@@ -1,4 +1,3 @@
-#pragma once
 #include <kiwi/ScriptType.h>
 
 namespace kiwi
@@ -567,7 +566,7 @@ namespace kiwi
         return "unknown";
     }
 
-    size_t isEmoji(char32_t c0, char32_t c1)
+    int isEmoji(char32_t c0, char32_t c1)
     {
         if (0x1f004 == c0) return 1;
         if (0x1f0cf == c0) return 1;