diff --git a/plugins-root/check_icmp.c b/plugins-root/check_icmp.c
index abd88c4e..0d10d22d 100644
--- a/plugins-root/check_icmp.c
+++ b/plugins-root/check_icmp.c
@@ -95,10 +95,6 @@ const char *email = "devel@monitoring-plugins.org";
 # define ICMP_UNREACH_PRECEDENCE_CUTOFF 15
 #endif
 
-#ifndef DBL_MAX
-# define DBL_MAX 9.9999999999e999
-#endif
-
 typedef unsigned short range_t;  /* type for get_range() -- unimplemented */
 
 typedef struct rta_host {