1 files changed, 3 insertions, 3 deletions
diff --git a/source/blender/blenlib/BLI_math_color.h b/source/blender/blenlib/BLI_math_color.h
index 2095c40b5aa..0d88ef46104 100644
--- a/source/blender/blenlib/BLI_math_color.h
+++ b/source/blender/blenlib/BLI_math_color.h
@@ -89,14 +89,14 @@ int constrain_rgb(float *r, float *g, float *b);
 void minmax_rgb(short c[3]);
 
 void rgb_float_set_hue_float_offset(float * rgb, float hue_offset);
-void rgb_byte_set_hue_float_offset(char * rgb, float hue_offset);
+void rgb_byte_set_hue_float_offset(unsigned char * rgb, float hue_offset);
 
 /***************** lift/gamma/gain / ASC-CDL conversion *****************/
 
 void lift_gamma_gain_to_asc_cdl(float *lift, float *gamma, float *gain, float *offset, float *slope, float *power);
 
-void rgb_byte_to_float(char *in, float *out);
-void rgb_float_to_byte(float *in, char *out);
+void rgb_byte_to_float(const unsigned char *in, float *out);
+void rgb_float_to_byte(const float *in, unsigned char *out);
 
 #ifdef __cplusplus
 }