diff --git a/src/m_swap.h b/src/m_swap.h
index 1ab82d3b1..a68a0837b 100644
--- a/src/m_swap.h
+++ b/src/m_swap.h
@@ -91,6 +91,16 @@ inline unsigned short LittleShort (unsigned short x)
 	return (unsigned short)((x>>8) | (x<<8));
 }
 
+inline short LittleShort (int x)
+{
+	return LittleShort((short)x);
+}
+
+inline unsigned short LittleShort (unsigned int x)
+{
+	return LittleShort((unsigned short)x);
+}
+
 // Swapping 32bit.
 inline unsigned int LittleLong (unsigned int x)
 {
@@ -110,6 +120,16 @@ inline int LittleLong (int x)
 		| (((unsigned int)x)<<24));
 }
 
+inline unsigned int LittleLong(unsigned long x)
+{
+	return LittleLong((unsigned int)x);
+}
+
+inline int LittleLong(long x)
+{
+	return LittleLong((int)x);
+}
+
 #define BigShort(x)		(x)
 #define BigLong(x)		(x)