diff --git a/src/analyze/analyze-time-data.h b/src/analyze/analyze-time-data.h
index e7ffd8549d8..fd228b59293 100644
--- a/src/analyze/analyze-time-data.h
+++ b/src/analyze/analyze-time-data.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
-#include <sd-bus.h>
+#include "sd-bus.h"
 
 #include "time-util.h"
 #include "unit-def.h"
diff --git a/src/home/homed-operation.h b/src/home/homed-operation.h
index af165bb4a52..e190e8e9704 100644
--- a/src/home/homed-operation.h
+++ b/src/home/homed-operation.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
-#include <sd-bus.h>
+#include "sd-bus.h"
 
 #include "user-record.h"
 
diff --git a/src/shared/common-signal.h b/src/shared/common-signal.h
index 1fe7b7623a4..3fd7d832991 100644
--- a/src/shared/common-signal.h
+++ b/src/shared/common-signal.h
@@ -3,7 +3,7 @@
 
 #include <syslog.h>
 
-#include <sd-event.h>
+#include "sd-event.h"
 
 /* All our long-running services should implement a SIGRTMIN+18 handler that can be used to trigger certain
  * actions that affect service runtime. The specific action is indicated via the "value integer" you can pass
diff --git a/src/test/test-mempress.c b/src/test/test-mempress.c
index dfbd63e6014..6bbc485de6d 100644
--- a/src/test/test-mempress.c
+++ b/src/test/test-mempress.c
@@ -5,8 +5,8 @@
 #include <sys/mman.h>
 #include <unistd.h>
 
-#include <sd-bus.h>
-#include <sd-event.h>
+#include "sd-bus.h"
+#include "sd-event.h"
 
 #include "bus-locator.h"
 #include "bus-wait-for-jobs.h"