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diff --git a/fltpoint.h b/fltpoint.h
index 20caa72..9704f5e 100644
--- a/fltpoint.h
+++ b/fltpoint.h
@@ -1,10 +1,21 @@
 //
-// Cross-platform floating point handling
+// Cross-platform floating point handling (fixed point handling too!)
 //
+// by James Hammons
+// (C) 2019 Underground Software
+//
+
+#ifndef __FLTPOINT_H__
+#define __FLTPOINT_H__
 
 #include <stdint.h>
 
 uint32_t FloatToIEEE754(float f);
 uint64_t DoubleToIEEE754(double d);
 void DoubleToExtended(double d, uint8_t out[]);
+uint32_t DoubleToDSPFloat(double d);
+
+uint64_t DoubleToFixedPoint(double d, int intBits, int fracBits);
+
+#endif	// __FLTPOINT_H__