diff --git a/code/game/ai_cmd.c b/code/game/ai_cmd.c
index 2944fb06d3..94beba87ea 100644
--- a/code/game/ai_cmd.c
+++ b/code/game/ai_cmd.c
@@ -208,7 +208,7 @@ float BotGetTime(bot_match_t *match) {
 		//match it to find out if the time is in seconds or minutes
 		if (trap_BotFindMatch(timestring, &timematch, MTCONTEXT_TIME)) {
 			if (timematch.type == MSG_FOREVER) {
-				t = 99999999.0f;
+				t = FLT_MAX; // 3.402823466e+38 seconds
 			}
 			else if (timematch.type == MSG_FORAWHILE) {
 				t = 10 * 60; // 10 minutes
diff --git a/code/game/bg_lib.h b/code/game/bg_lib.h
index 75e3a44e3f..823af2cd21 100644
--- a/code/game/bg_lib.h
+++ b/code/game/bg_lib.h
@@ -56,6 +56,7 @@ typedef char *  va_list;
 #define INT_MAX       0x7fffffff    /* maximum (signed) int value */
 #define INT_MIN     (-INT_MAX - 1)  /* minimum (signed) int value */
 #define UINT_MAX      0xffffffff    /* maximum unsigned int value */
+#define FLT_MAX       0x7f7fffff    /* maximum float value */
 #define LONG_MAX      0x7fffffffL   /* maximum (signed) long value */
 #define LONG_MIN    (-LONG_MAX - 1) /* minimum (signed) long value */
 #define ULONG_MAX     0xffffffffUL  /* maximum unsigned long value */