diff --git a/common/rfb/ScaleFilters.cxx b/common/rfb/ScaleFilters.cxx
index a3ee53e..07f3db8 100644
--- a/common/rfb/ScaleFilters.cxx
+++ b/common/rfb/ScaleFilters.cxx
@@ -82,7 +82,7 @@
   filters[scaleFilterBicubic] = create("Bicubic", 2, cubic);
 }
 
-SFilter ScaleFilters::create(char *name_, double radius_, filter_func func_) {
+SFilter ScaleFilters::create(const char *name_, double radius_, filter_func func_) {
   SFilter filter;
   strncpy(filter.name, name_, sizeof(filter.name)-1); 
   filter.name[sizeof(filter.name)-1] = '\0';
diff --git a/common/rfb/ScaleFilters.h b/common/rfb/ScaleFilters.h
index a506d35..23c87b6 100644
--- a/common/rfb/ScaleFilters.h
+++ b/common/rfb/ScaleFilters.h
@@ -73,7 +73,7 @@
   protected:
     void initFilters();
 
-    SFilter create(char *name_, double radius_, filter_func func_);
+    SFilter create(const char *name_, double radius_, filter_func func_);
 
     SFilter filters[scaleFilterMaxNumber+1];
   };