diff --git a/SPIRV/GlslangToSpv.cpp b/SPIRV/GlslangToSpv.cpp
index b65d6ed..50d53d5 100755
--- a/SPIRV/GlslangToSpv.cpp
+++ b/SPIRV/GlslangToSpv.cpp
@@ -3345,7 +3345,7 @@
 
     // lod
     if (cracked.lod) {
-        params.lod = arguments[2];
+        params.lod = arguments[2 + extraArgs];
         ++extraArgs;
     } else if (glslangIntermediate->getStage() != EShLangFragment) {
         // we need to invent the default lod for an explicit lod instruction for a non-fragment stage
@@ -3354,7 +3354,7 @@
 
     // multisample
     if (sampler.ms) {
-        params.sample = arguments[2]; // For MS, "sample" should be specified
+        params.sample = arguments[2 + extraArgs]; // For MS, "sample" should be specified
         ++extraArgs;
     }