diff --git a/src/add-ons/translators/raw/RAW.cpp b/src/add-ons/translators/raw/RAW.cpp
index 00afe37c65..ab1e59d842 100644
--- a/src/add-ons/translators/raw/RAW.cpp
+++ b/src/add-ons/translators/raw/RAW.cpp
@@ -1348,7 +1348,7 @@ DCRaw::_CameraXYZCoefficients(double cameraXYZ[4][3])
 /*!	Thanks to Adobe for providing these excellent CAM -> XYZ matrices!
 */
 void
-DCRaw::_AdobeCoefficients(char *make, char *model)
+DCRaw::_AdobeCoefficients(const char *make, const char *model)
 {
 	static const struct {
 		const char *prefix;
diff --git a/src/add-ons/translators/raw/RAW.h b/src/add-ons/translators/raw/RAW.h
index 05823574da..f377d4cdf0 100644
--- a/src/add-ons/translators/raw/RAW.h
+++ b/src/add-ons/translators/raw/RAW.h
@@ -99,7 +99,7 @@ class DCRaw {
 		void _PreInterpolate();
 		void _CameraToCIELab(ushort cam[4], float lab[3]);
 		void _CameraXYZCoefficients(double cam_xyz[4][3]);
-		void _AdobeCoefficients(char* manufacturer, char* model);
+		void _AdobeCoefficients(const char *manufacturer, const char *model);
 		void _BorderInterpolate(uint32 border);
 		void _AHDInterpolate();
 		void _PseudoInverse(double (*in)[3], double (*out)[3], uint32 size);