diff --git a/src/mdlib.c b/src/mdlib.c
index fa07251c5..400a0f2b8 100644
--- a/src/mdlib.c
+++ b/src/mdlib.c
@@ -313,7 +313,7 @@ RESTORE_WARNING_FORMAT_NONLITERAL
  *      transfer relevant generated monstr values to include/monsters.h;
  *      delete src/monstr.c.
  */
-static boolean ranged_attk(struct permonst *);
+static boolean mdlib_ranged_attk(struct permonst *);
 
  /*
  * This routine is designed to return an integer value which represents
@@ -333,7 +333,7 @@ mstrength(struct permonst* ptr)
     n += (!!(ptr->geno & G_LGROUP)) << 1;
 
     /* for ranged attacks */
-    if (ranged_attk(ptr))
+    if (mdlib_ranged_attk(ptr))
         n++;
 
     /* for higher ac values */
@@ -380,7 +380,7 @@ mstrength(struct permonst* ptr)
 
 /* returns True if monster can attack at range */
 static boolean
-ranged_attk(register struct permonst* ptr)
+mdlib_ranged_attk(register struct permonst* ptr)
 {
     register int i, j;
     register int atk_mask = (1 << AT_BREA) | (1 << AT_SPIT) | (1 << AT_GAZE);