diff --git a/indra/newview/llviewertexture.cpp b/indra/newview/llviewertexture.cpp
index 530e106a77..21e7db2ddf 100644
--- a/indra/newview/llviewertexture.cpp
+++ b/indra/newview/llviewertexture.cpp
@@ -559,7 +559,7 @@ void LLViewerTexture::updateClass()
 
     // try to leave half a GB for everyone else, but keep at least 768MB for ourselves
     F32 target = llmax(budget - 512.f, MIN_VRAM_BUDGET);
-    sFreeVRAMMegabytes = target - used;
+    sFreeVRAMMegabytes = llmax(target - used, 0.f);
 
     F32 over_pct = llmax((used-target) / target, 0.f);
     // <FS:Ansariel> Restrict texture memory by available physical system memory