diff --git a/absl/debugging/symbolize_elf.inc b/absl/debugging/symbolize_elf.inc
index 0317bbc..e4a5060 100644
--- a/absl/debugging/symbolize_elf.inc
+++ b/absl/debugging/symbolize_elf.inc
@@ -1086,17 +1086,24 @@ static ABSL_ATTRIBUTE_NOINLINE bool ReadAddrMap(
     void *arg, void *tmp_buf, size_t tmp_buf_size) {
   // Use /proc/self/task/<pid>/maps instead of /proc/self/maps. The latter
   // requires kernel to stop all threads, and is significantly slower when there
-  // are 1000s of threads.
+  // are 1000s of threads. Some container procfs implementations do not expose
+  // per-thread maps files, so fall back to /proc/self/maps when needed.
   char maps_path[80];
   snprintf(maps_path, sizeof(maps_path), "/proc/self/task/%d/maps", getpid());
 
   int maps_fd;
   NO_INTR(maps_fd = OpenReadOnlyWithHighFD(maps_path));
-  FileDescriptor wrapped_maps_fd(maps_fd);
-  if (wrapped_maps_fd.get() < 0) {
-    ABSL_RAW_LOG(WARNING, "%s: errno=%d", maps_path, errno);
-    return false;
+  if (maps_fd < 0) {
+    const int task_maps_errno = errno;
+    NO_INTR(maps_fd = OpenReadOnlyWithHighFD("/proc/self/maps"));
+    if (maps_fd < 0) {
+      const int self_maps_errno = errno;
+      ABSL_RAW_LOG(WARNING, "%s: errno=%d; /proc/self/maps: errno=%d",
+                   maps_path, task_maps_errno, self_maps_errno);
+      return false;
+    }
   }
+  FileDescriptor wrapped_maps_fd(maps_fd);
 
   // Iterate over maps and look for the map containing the pc.  Then
   // look into the symbol tables inside.