diff --git a/debuggerd/tombstone.cpp b/debuggerd/tombstone.cpp
index 1e47483..b9fbe07 100644
--- a/debuggerd/tombstone.cpp
+++ b/debuggerd/tombstone.cpp
@@ -571,7 +571,7 @@
 
     if (log_entry.id() == LOG_ID_EVENTS) {
       if (!g_eventTagMap) {
-        g_eventTagMap = android_openEventTagMap(EVENT_TAG_MAP_FILE);
+        g_eventTagMap = android_openEventTagMap(NULL);
       }
       AndroidLogEntry e;
       char buf[512];
diff --git a/liblog/event_tag_map.c b/liblog/event_tag_map.c
index f9cad99..e8e0335 100644
--- a/liblog/event_tag_map.c
+++ b/liblog/event_tag_map.c
@@ -73,12 +73,13 @@
     EventTagMap* newTagMap;
     off_t end;
     int save_errno;
+    const char* tagfile = fileName ? fileName : EVENT_TAG_MAP_FILE;
 
-    int fd = open(fileName, O_RDONLY | O_CLOEXEC);
+    int fd = open(tagfile, O_RDONLY | O_CLOEXEC);
     if (fd < 0) {
         save_errno = errno;
         fprintf(stderr, "%s: unable to open map '%s': %s\n",
-                OUT_TAG, fileName, strerror(save_errno));
+                OUT_TAG, tagfile, strerror(save_errno));
         goto fail_errno;
     }
 
@@ -87,7 +88,7 @@
     (void) lseek(fd, 0L, SEEK_SET);
     if (end < 0) {
         fprintf(stderr, "%s: unable to seek map '%s' %s\n",
-                OUT_TAG, fileName, strerror(save_errno));
+                OUT_TAG, tagfile, strerror(save_errno));
         goto fail_close;
     }
 
@@ -103,7 +104,7 @@
     fd = -1;
     if ((newTagMap->mapAddr == MAP_FAILED) || (newTagMap->mapAddr == NULL)) {
         fprintf(stderr, "%s: mmap(%s) failed: %s\n",
-                OUT_TAG, fileName, strerror(save_errno));
+                OUT_TAG, tagfile, strerror(save_errno));
         goto fail_free;
     }
 
diff --git a/liblog/logger_write.c b/liblog/logger_write.c
index 157bd88..170c8d1 100644
--- a/liblog/logger_write.c
+++ b/liblog/logger_write.c
@@ -293,7 +293,7 @@
             ret = __android_log_trylock();
             m = (EventTagMap *)atomic_load(&tagMap); /* trylock flush cache */
             if (!m) {
-                m = android_openEventTagMap(EVENT_TAG_MAP_FILE);
+                m = android_openEventTagMap(NULL);
                 if (ret) { /* trylock failed, use local copy, mark for close */
                     f = m;
                 } else {
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index 41f2280..94b8691 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -177,7 +177,7 @@
         static EventTagMap *eventTagMap = NULL;
 
         if (!eventTagMap && !hasOpenedEventTagMap) {
-            eventTagMap = android_openEventTagMap(EVENT_TAG_MAP_FILE);
+            eventTagMap = android_openEventTagMap(NULL);
             hasOpenedEventTagMap = true;
         }
         err = android_log_processBinaryLogBuffer(&buf->entry_v1, &entry,
diff --git a/logd/main.cpp b/logd/main.cpp
index 7550c41..c3343d7 100644
--- a/logd/main.cpp
+++ b/logd/main.cpp
@@ -311,7 +311,7 @@
     if (!map) {
         sem_wait(&sem_name);
         if (!map) {
-            map = android_openEventTagMap(EVENT_TAG_MAP_FILE);
+            map = android_openEventTagMap(NULL);
         }
         sem_post(&sem_name);
         if (!map) {