diff --git a/src/DebugLogger.cc b/src/DebugLogger.cc
index 90babe2358..e9bed5817b 100644
--- a/src/DebugLogger.cc
+++ b/src/DebugLogger.cc
@@ -21,11 +21,6 @@ DebugLogger::Stream DebugLogger::streams[NUM_DBGS] =
      {"plugins", 0, false},   {"zeekygen", 0, false},   {"pktio", 0, false},           {"broker", 0, false},
      {"scripts", 0, false},   {"supervisor", 0, false}, {"hashkey", 0, false},         {"spicy", 0, false}};
 
-DebugLogger::DebugLogger() {
-    verbose = false;
-    file = nullptr;
-}
-
 DebugLogger::~DebugLogger() {
     if ( file && file != stderr )
         fclose(file);
@@ -94,6 +89,7 @@ void DebugLogger::EnableStreams(const char* s) {
                 enabled_streams.insert(streams[i].prefix);
             }
 
+            all = true;
             verbose = true;
             goto next;
         }
@@ -175,10 +171,11 @@ void DebugLogger::Log(DebugStream stream, const char* fmt, ...) {
 }
 
 void DebugLogger::Log(const plugin::Plugin& plugin, const char* fmt, ...) {
-    std::string tok = PluginStreamName(plugin.Name());
-
-    if ( enabled_streams.find(tok) == enabled_streams.end() )
-        return;
+    if ( ! all ) {
+        std::string tok = PluginStreamName(plugin.Name());
+        if ( enabled_streams.find(tok) == enabled_streams.end() )
+            return;
+    }
 
     fprintf(file, "%17.06f/%17.06f [plugin %s] ", run_state::network_time, util::current_time(true),
             plugin.Name().c_str());
diff --git a/src/DebugLogger.h b/src/DebugLogger.h
index bb2c344859..b331019f45 100644
--- a/src/DebugLogger.h
+++ b/src/DebugLogger.h
@@ -63,7 +63,7 @@ namespace detail {
 class DebugLogger {
 public:
     // Output goes to stderr per default.
-    DebugLogger();
+    DebugLogger() : file(nullptr), all(false), verbose(false) {};
     ~DebugLogger();
 
     void OpenDebugLog(const char* filename = 0);
@@ -95,6 +95,7 @@ public:
 
 private:
     FILE* file;
+    bool all;
     bool verbose;
 
     struct Stream {
diff --git a/testing/btest/plugins/debug-streams-all.js b/testing/btest/plugins/debug-streams-all.js
new file mode 100644
index 0000000000..0fde271911
--- /dev/null
+++ b/testing/btest/plugins/debug-streams-all.js
@@ -0,0 +1,12 @@
+/*
+ * Verify that `-B all` leads to plugin debug stream content in debug.log.
+ * This requires JavaScript and a debug build.
+ * @TEST-REQUIRES: test "$($BUILD/zeek-config --build_type)" = "debug"
+ * @TEST-REQUIRES: $SCRIPTS/have-javascript
+ * @TEST-EXEC: zeek -b -B all %INPUT
+ * @TEST-EXEC: grep -q '[plugin Zeek::JavaScript]' debug.log
+ */
+
+zeek.on('zeek_init', () => {
+  console.log('Hello Zeek!');
+});