diff --git a/src/GBI.h b/src/GBI.h
index 33a2320f4..0d3fa6e30 100644
--- a/src/GBI.h
+++ b/src/GBI.h
@@ -55,8 +55,8 @@
 #define _FIXED2FLOAT( v, b ) \
 	((f32)v * FIXED2FLOATRECIP##b)
 
-#define FIXED2FLOATRECIPCOLOR7	0.00787401572f
-#define FIXED2FLOATRECIPCOLOR8	0.00392156886f
+#define FIXED2FLOATRECIPCOLOR7	7.8740157186985015869140625e-03f
+#define FIXED2FLOATRECIPCOLOR8	3.9215688593685626983642578125e-03f
 
 #define _FIXED2FLOATCOLOR( v, b ) \
 	((f32)v * FIXED2FLOATRECIPCOLOR##b)