2 files changed, 3 insertions, 3 deletions
diff --git a/src/XpmI.h b/src/XpmI.h
index 4360ad3..70da79e 100644
--- a/src/XpmI.h
+++ b/src/XpmI.h
@@ -254,7 +254,7 @@ FUNC(xpmParseExtensions, int, (xpmData *data, XpmExtension **extensions,
 
 /* RGB utility */
 
-FUNC(xpmReadRgbNames, int, (char *rgb_fname, xpmRgbName *rgbn));
+FUNC(xpmReadRgbNames, int, (const char *rgb_fname, xpmRgbName *rgbn));
 FUNC(xpmGetRgbName, char *, (xpmRgbName *rgbn, int rgbn_max,
 			     int red, int green, int blue));
 FUNC(xpmFreeRgbNames, void, (xpmRgbName *rgbn, int rgbn_max));
diff --git a/src/rgb.c b/src/rgb.c
index 729898d..5c350eb 100644
--- a/src/rgb.c
+++ b/src/rgb.c
@@ -57,7 +57,7 @@
  */
 int
 xpmReadRgbNames(
-    char	*rgb_fname,
+    const char	*rgb_fname,
     xpmRgbName	 rgbn[])
 {
     FILE *rgbf;
@@ -162,7 +162,7 @@ xpmFreeRgbNames(
 
 int
 xpmReadRgbNames(
-    char	*rgb_fname,
+    const char	*rgb_fname,
     xpmRgbName	 rgbn[])
 {
     /*