diff --git a/code/setup.dm b/code/setup.dm
index c18d1ac0d12..73d0c33d0b9 100644
--- a/code/setup.dm
+++ b/code/setup.dm
@@ -223,7 +223,7 @@ var/MAX_EX_FLASH_RANGE = 14
 
 #define BLOCK_GAS_SMOKE_EFFECT	8192	// blocks the effect that chemical clouds would have on a mob --glasses, mask and helmets ONLY! (NOTE: flag shared with ONESIZEFITSALL)
 #define ONESIZEFITSALL 			8192
-#define PLASMAGUARD 			1638	//Does not get contaminated by plasma.
+#define PLASMAGUARD 			16384	//Does not get contaminated by plasma.
 
 #define	NOREACT					16384 	//Reagents dont' react inside this container.