diff --git a/src/mips64/simulator-mips64.h b/src/mips64/simulator-mips64.h
index 7f60a74..cd606e2 100644
--- a/src/mips64/simulator-mips64.h
+++ b/src/mips64/simulator-mips64.h
@@ -84,7 +84,7 @@
 // Running with a simulator.
 
 #include "src/assembler.h"
-#include "src/hashmap.h"
+#include "src/base/hashmap.h"
 
 namespace v8 {
 namespace internal {
@@ -226,7 +226,7 @@
   // Call on program start.
   static void Initialize(Isolate* isolate);
 
-  static void TearDown(HashMap* i_cache, Redirection* first);
+  static void TearDown(base::HashMap* i_cache, Redirection* first);
 
   // V8 generally calls into generated JS code with 5 parameters and into
   // generated RegExp code with 7 parameters. This is a convenience function,
@@ -246,8 +246,7 @@
   char* last_debugger_input() { return last_debugger_input_; }
 
   // ICache checking.
-  static void FlushICache(v8::internal::HashMap* i_cache, void* start,
-                          size_t size);
+  static void FlushICache(base::HashMap* i_cache, void* start, size_t size);
 
   // Returns true if pc register contains one of the 'special_values' defined
   // below (bad_ra, end_sim_pc).
@@ -415,10 +414,9 @@
   }
 
   // ICache.
-  static void CheckICache(v8::internal::HashMap* i_cache, Instruction* instr);
-  static void FlushOnePage(v8::internal::HashMap* i_cache, intptr_t start,
-                           size_t size);
-  static CachePage* GetCachePage(v8::internal::HashMap* i_cache, void* page);
+  static void CheckICache(base::HashMap* i_cache, Instruction* instr);
+  static void FlushOnePage(base::HashMap* i_cache, intptr_t start, size_t size);
+  static CachePage* GetCachePage(base::HashMap* i_cache, void* page);
 
   enum Exception {
     none,
@@ -463,7 +461,7 @@
   char* last_debugger_input_;
 
   // Icache simulation.
-  v8::internal::HashMap* i_cache_;
+  base::HashMap* i_cache_;
 
   v8::internal::Isolate* isolate_;