diff --git a/ipl_tools/ipl_tools.h b/ipl_tools/ipl_tools.h
index 69611de3..91906eac 100644
--- a/ipl_tools/ipl_tools.h
+++ b/ipl_tools/ipl_tools.h
@@ -53,8 +53,6 @@ extern void print_eckd(int show_ipl, const char *name);
 extern int is_lpar(void);
 extern int is_root(void);
 
-extern void strlow(char *s);
-
 extern void write_str(char *string, char *file);
 extern int write_str_errno(char *string, char *file);
 extern void read_str(char *string, const char *file, size_t len);
diff --git a/ipl_tools/system.c b/ipl_tools/system.c
index e9a41544..c9e56822 100644
--- a/ipl_tools/system.c
+++ b/ipl_tools/system.c
@@ -46,17 +46,6 @@ int is_root(void)
 		return 0;
 }
 
-/*
- * Convert a string to lower case
- */
-void strlow(char *s)
-{
-	while (*s) {
-		*s = tolower(*s);
-		s++;
-	}
-}
-
 /*
  * Read a string from a particular file
  */