diff --git a/src/ast/intrinsic.cc b/src/ast/intrinsic.cc
index 6006bcb..fd274ea 100644
--- a/src/ast/intrinsic.cc
+++ b/src/ast/intrinsic.cc
@@ -227,8 +227,8 @@
 namespace intrinsic {
 
 bool IsCoarseDerivative(ast::Intrinsic i) {
-  return i == Intrinsic::kDpdxCoarse ||
-         i == Intrinsic::kDpdyCoarse | i == Intrinsic::kFwidthCoarse;
+  return i == Intrinsic::kDpdxCoarse || i == Intrinsic::kDpdyCoarse ||
+         i == Intrinsic::kFwidthCoarse;
 }
 
 bool IsFineDerivative(ast::Intrinsic i) {