diff --git a/llvm/include/llvm/Cheerp/NameGenerator.h b/llvm/include/llvm/Cheerp/NameGenerator.h
index c0b84e184276..788778ea358d 100644
--- a/llvm/include/llvm/Cheerp/NameGenerator.h
+++ b/llvm/include/llvm/Cheerp/NameGenerator.h
@@ -68,6 +68,15 @@ class NameGenerator
 		HANDLE_VAARG,
 		EXCEPTION,
 		FETCHBUFFER,
+		ATOMICLOAD,
+		ATOMICSTORE,
+		ATOMICADD,
+		ATOMICSUB,
+		ATOMICAND,
+		ATOMICOR,
+		ATOMICXOR,
+		ATOMICXCHG,
+		ATOMICCMPXCHG,
 		MEMORY,
 		HEAP8,
 		HEAP16,
diff --git a/llvm/lib/CheerpWriter/NameGenerator.cpp b/llvm/lib/CheerpWriter/NameGenerator.cpp
index 37d49bf1ed8d..17615cb078fc 100644
--- a/llvm/lib/CheerpWriter/NameGenerator.cpp
+++ b/llvm/lib/CheerpWriter/NameGenerator.cpp
@@ -678,6 +678,15 @@ void NameGenerator::generateReadableNames(const Module& M, const GlobalDepsAnaly
 	builtins[EXCEPTION] = "$except";
 	builtins[FETCHBUFFER] = "fetchBuffer";
 	builtins[STACKPTR] = "__stackPtr";
+	builtins[ATOMICLOAD] = "__atomicload";
+	builtins[ATOMICSTORE] = "__atomicstore";
+	builtins[ATOMICADD] = "__atomicadd";
+	builtins[ATOMICSUB] = "__atomicsub";
+	builtins[ATOMICAND] = "__atomicand";
+	builtins[ATOMICOR] = "__atomicor";
+	builtins[ATOMICXOR] = "__atomicxor";
+	builtins[ATOMICXCHG] = "__atomicexchange";
+	builtins[ATOMICCMPXCHG] = "__atomiccompareExchange";
 	builtins[HEAP8] = "HEAP8";
 	builtins[HEAP16] = "HEAP16";
 	builtins[HEAP32] = "HEAP32";