diff --git a/src/w_wad.c b/src/w_wad.c
index be6bf33e..ac226c93 100644
--- a/src/w_wad.c
+++ b/src/w_wad.c
@@ -464,7 +464,7 @@ void W_ReleaseLumpNum(lumpindex_t lumpnum)
     }
 }
 
-void W_ReleaseLumpName(char *name)
+void W_ReleaseLumpName(const char *name)
 {
     W_ReleaseLumpNum(W_GetNumForName(name));
 }
diff --git a/src/w_wad.h b/src/w_wad.h
index 49d6d10d..ef026f6d 100644
--- a/src/w_wad.h
+++ b/src/w_wad.h
@@ -70,6 +70,6 @@ void W_GenerateHashTable(void);
 extern unsigned int W_LumpNameHash(const char *s);
 
 void W_ReleaseLumpNum(lumpindex_t lump);
-void W_ReleaseLumpName(char *name);
+void W_ReleaseLumpName(const char *name);
 
 #endif