diff --git a/src/jsregexp.cc b/src/jsregexp.cc
index 0813afbe84..1843597e74 100644
--- a/src/jsregexp.cc
+++ b/src/jsregexp.cc
@@ -6121,7 +6121,7 @@ RegExpEngine::CompilationResult RegExpEngine::Compile(
 #else  // V8_INTERPRETED_REGEXP
   // Interpreted regexp implementation.
   EmbeddedVector<byte, 1024> codes;
-  RegExpMacroAssemblerIrregexp macro_assembler(codes, zone);
+  RegExpMacroAssemblerIrregexp macro_assembler(isolate, codes, zone);
 #endif  // V8_INTERPRETED_REGEXP
 
   macro_assembler.set_slow_safe(TooMuchRegExpCode(pattern));
diff --git a/src/regexp-macro-assembler-irregexp.cc b/src/regexp-macro-assembler-irregexp.cc
index 469fb8cbb3..5574730a57 100644
--- a/src/regexp-macro-assembler-irregexp.cc
+++ b/src/regexp-macro-assembler-irregexp.cc
@@ -16,14 +16,15 @@ namespace internal {
 
 #ifdef V8_INTERPRETED_REGEXP
 
-RegExpMacroAssemblerIrregexp::RegExpMacroAssemblerIrregexp(Vector<byte> buffer,
+RegExpMacroAssemblerIrregexp::RegExpMacroAssemblerIrregexp(Isolate* isolate,
+                                                           Vector<byte> buffer,
                                                            Zone* zone)
-    : RegExpMacroAssembler(zone),
+    : RegExpMacroAssembler(isolate, zone),
       buffer_(buffer),
       pc_(0),
       own_buffer_(false),
       advance_current_end_(kInvalidPC),
-      isolate_(zone->isolate()) { }
+      isolate_(isolate) {}
 
 
 RegExpMacroAssemblerIrregexp::~RegExpMacroAssemblerIrregexp() {
diff --git a/src/regexp-macro-assembler-irregexp.h b/src/regexp-macro-assembler-irregexp.h
index b192c22b6f..781defc297 100644
--- a/src/regexp-macro-assembler-irregexp.h
+++ b/src/regexp-macro-assembler-irregexp.h
@@ -27,7 +27,8 @@ class RegExpMacroAssemblerIrregexp: public RegExpMacroAssembler {
   // for code generation and assumes its size to be buffer_size. If the buffer
   // is too small, a fatal error occurs. No deallocation of the buffer is done
   // upon destruction of the assembler.
-  RegExpMacroAssemblerIrregexp(Vector<byte>, Zone* zone);
+  RegExpMacroAssemblerIrregexp(Isolate* isolate, Vector<byte> buffer,
+                               Zone* zone);
   virtual ~RegExpMacroAssemblerIrregexp();
   // The byte-code interpreter checks on each push anyway.
   virtual int stack_limit_slack() { return 1; }
diff --git a/test/cctest/test-regexp.cc b/test/cctest/test-regexp.cc
index 8aa9ffb015..2fe46d53ea 100644
--- a/test/cctest/test-regexp.cc
+++ b/test/cctest/test-regexp.cc
@@ -1372,8 +1372,9 @@ TEST(MacroAssemblerNativeLotsOfRegisters) {
 
 TEST(MacroAssembler) {
   byte codes[1024];
-  Zone zone(CcTest::i_isolate());
-  RegExpMacroAssemblerIrregexp m(Vector<byte>(codes, 1024), &zone);
+  Zone zone;
+  RegExpMacroAssemblerIrregexp m(CcTest::i_isolate(), Vector<byte>(codes, 1024),
+                                 &zone);
   // ^f(o)o.
   Label start, fail, backtrack;