--- a/gfx/angle/checkout/src/compiler/translator/SymbolTable.h	2021-12-18 20:08:37.201922846 +0000
+++ b/gfx/angle/checkout/src/compiler/translator/SymbolTable.h	2021-12-18 20:07:06.059597581 +0000
@@ -30,6 +30,7 @@
 //   are tracked in the intermediate representation, not the symbol table.
 //
 
+#include <cmath>
 #include <limits>
 #include <memory>
 #include <set>
