diff --git a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
index 7c5304e..238c00c 100644
--- a/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
+++ b/debuggerd/libdebuggerd/include/libdebuggerd/utility.h
@@ -18,6 +18,7 @@
 #ifndef _DEBUGGERD_UTILITY_H
 #define _DEBUGGERD_UTILITY_H
 
+#include <inttypes.h>
 #include <signal.h>
 #include <stdbool.h>
 #include <sys/types.h>
@@ -25,7 +26,6 @@
 #include <string>
 
 #include <android-base/macros.h>
-#include <backtrace/Backtrace.h>
 
 struct log_t {
   // Tombstone file descriptor.
@@ -61,6 +61,14 @@
   OPEN_FILES
 };
 
+#if defined(__LP64__)
+#define PRIPTR "016" PRIx64
+typedef uint64_t word_t;
+#else
+#define PRIPTR "08" PRIx64
+typedef uint32_t word_t;
+#endif
+
 // Log information onto the tombstone.
 void _LOG(log_t* log, logtype ltype, const char* fmt, ...) __attribute__((format(printf, 3, 4)));
 
diff --git a/debuggerd/libdebuggerd/test/tombstone_test.cpp b/debuggerd/libdebuggerd/test/tombstone_test.cpp
index eed5bd3..3196ce8 100644
--- a/debuggerd/libdebuggerd/test/tombstone_test.cpp
+++ b/debuggerd/libdebuggerd/test/tombstone_test.cpp
@@ -15,6 +15,7 @@
  */
 
 #include <stdlib.h>
+#include <sys/mman.h>
 #include <time.h>
 
 #include <memory>
diff --git a/debuggerd/libdebuggerd/tombstone.cpp b/debuggerd/libdebuggerd/tombstone.cpp
index 4bdb9c8..4c1d633 100644
--- a/debuggerd/libdebuggerd/tombstone.cpp
+++ b/debuggerd/libdebuggerd/tombstone.cpp
@@ -27,6 +27,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/mman.h>
 #include <sys/ptrace.h>
 #include <sys/stat.h>
 #include <time.h>
diff --git a/debuggerd/libdebuggerd/utility.cpp b/debuggerd/libdebuggerd/utility.cpp
index d0c5234..7aebea8 100644
--- a/debuggerd/libdebuggerd/utility.cpp
+++ b/debuggerd/libdebuggerd/utility.cpp
@@ -35,7 +35,6 @@
 #include <android-base/stringprintf.h>
 #include <android-base/strings.h>
 #include <android-base/unique_fd.h>
-#include <backtrace/Backtrace.h>
 #include <debuggerd/handler.h>
 #include <log/log.h>
 #include <unwindstack/Memory.h>