diff --git a/src/game/bot.c b/src/game/bot.c
index b9b4c0a2e..2f087092f 100644
--- a/src/game/bot.c
+++ b/src/game/bot.c
@@ -268,7 +268,14 @@ void botSpawn(struct chrdata *chr, u8 respawning)
 				&& g_MpSetup.weapons[0] != MPWEAPON_SHIELD) {
 			struct mpweapon *mpweapon = &g_MpWeapons[g_MpSetup.weapons[0]];
 			botinvGiveSingleWeapon(chr, mpweapon->weaponnum);
-			botactGiveAmmoByType(aibot, mpweapon->priammotype - 1, mpweapon->priammoqty / 2);
+			const s32 ammotype = (g_MpSetup.weapons[0] == MPWEAPON_COMBATBOOST) ? AMMOTYPE_BOOST : mpweapon->priammotype;
+			if (ammotype) {
+				s32 startammo = mpweapon->priammoqty / 2;
+				if (startammo == 0) {
+					startammo = 1;
+				}
+				botactGiveAmmoByType(aibot, ammotype, startammo);
+			}
 			botinvSwitchToWeapon(chr, mpweapon->weaponnum, FUNC_PRIMARY);
 		}
 #endif
diff --git a/src/game/player.c b/src/game/player.c
index f7ac65eb9..389195977 100644
--- a/src/game/player.c
+++ b/src/game/player.c
@@ -1111,9 +1111,16 @@ void playerSpawn(void)
 					&& g_MpSetup.weapons[0] != MPWEAPON_SHIELD) {
 				struct mpweapon *mpweapon = &g_MpWeapons[g_MpSetup.weapons[0]];
 				invGiveSingleWeapon(mpweapon->weaponnum);
+				const s32 ammotype = (g_MpSetup.weapons[0] == MPWEAPON_COMBATBOOST) ? AMMOTYPE_BOOST : mpweapon->priammotype;
+				if (ammotype) {
+					s32 startammo = mpweapon->priammoqty / 2;
+					if (startammo == 0) {
+						startammo = 1;
+					}
+					bgunSetAmmoQuantity(ammotype, startammo);
+				}
 				bgunEquipWeapon2(HAND_LEFT, WEAPON_NONE);
 				bgunEquipWeapon2(HAND_RIGHT, mpweapon->weaponnum);
-				bgunSetAmmoQuantity(mpweapon->priammotype, mpweapon->priammoqty / 2);
 			} else
 #endif
 			{