diff --git a/rtexif/rtexif.cc b/rtexif/rtexif.cc
index 707e83d99..10373fd35 100644
--- a/rtexif/rtexif.cc
+++ b/rtexif/rtexif.cc
@@ -2272,10 +2272,6 @@ short int int2_to_signed (short unsigned int i) {
   return u.s;
 }
 
-int getTypeSize( TagType type ){
-	return ("11124811248484"[type<14?type:0]-'0');
-}
-
 /* Function to parse and extract focal length and aperture information from description
  * @fullname must conform to the following formats
  * <focal>mm f/<aperture>
diff --git a/rtexif/rtexif.h b/rtexif/rtexif.h
index eb48acdb8..7604e7d79 100644
--- a/rtexif/rtexif.h
+++ b/rtexif/rtexif.h
@@ -431,7 +431,9 @@ protected:
     }
 };
 
-inline static int getTypeSize( TagType type );
+inline static int getTypeSize( TagType type ) {
+    return ("11124811248484"[type<14?type:0]-'0');
+}
 
 extern const TagAttrib exifAttribs[];
 extern const TagAttrib gpsAttribs[];