diff --git a/src/OpenGL/compiler/ParseHelper.cpp b/src/OpenGL/compiler/ParseHelper.cpp
index cf6aa95..b795c06 100644
--- a/src/OpenGL/compiler/ParseHelper.cpp
+++ b/src/OpenGL/compiler/ParseHelper.cpp
@@ -3605,7 +3605,9 @@
 					//
 					// Treat it like a built-in unary operator.
 					//
-					callNode = createUnaryMath(op, paramNode->getAsTyped(), loc, &fnCandidate->getReturnType());
+					TIntermNode *operand = paramNode->getAsAggregate()->getSequence()[0];
+					callNode = createUnaryMath(op, operand->getAsTyped(), loc, &fnCandidate->getReturnType());
+
 					if(callNode == nullptr)
 					{
 						std::stringstream extraInfoStream;