4 files changed, 32 insertions, 0 deletions
diff --git a/src/systemd/sd-id128.h b/src/systemd/sd-id128.h
index 22fcb93271..af2841eb77 100644
--- a/src/systemd/sd-id128.h
+++ b/src/systemd/sd-id128.h
@@ -26,6 +26,10 @@
 #include <stdbool.h>
 #include <string.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef union sd_id128 sd_id128_t;
 
 union sd_id128 {
@@ -58,4 +62,8 @@ static inline bool sd_id128_equal(sd_id128_t a, sd_id128_t b) {
         return memcmp(&a, &b, 16) == 0;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/src/systemd/sd-journal.h b/src/systemd/sd-journal.h
index c635df3f2a..8737a4cac7 100644
--- a/src/systemd/sd-journal.h
+++ b/src/systemd/sd-journal.h
@@ -29,6 +29,10 @@
 
 #include <systemd/sd-id128.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* TODO:
  *
  *   - OR of matches is borked...
@@ -122,4 +126,8 @@ int sd_journal_process(sd_journal *j);
 #define SD_JOURNAL_FOREACH_UNIQUE(j, data, l)                           \
         for (sd_journal_restart_unique(j); sd_journal_enumerate_data((j), &(data), &(l)) > 0; )
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/src/systemd/sd-login.h b/src/systemd/sd-login.h
index 7d76f9a44e..7746c742ff 100644
--- a/src/systemd/sd-login.h
+++ b/src/systemd/sd-login.h
@@ -24,6 +24,10 @@
 
 #include <sys/types.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * A few points:
  *
@@ -125,4 +129,8 @@ int sd_login_monitor_flush(sd_login_monitor *m);
 /* Get FD from monitor */
 int sd_login_monitor_get_fd(sd_login_monitor *m);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
diff --git a/src/systemd/sd-messages.h b/src/systemd/sd-messages.h
index 8e52d95ebb..5fd1aa7e31 100644
--- a/src/systemd/sd-messages.h
+++ b/src/systemd/sd-messages.h
@@ -24,8 +24,16 @@
 
 #include <systemd/sd-id128.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define SD_MESSAGE_JOURNAL_START   SD_ID128_MAKE(f7,73,79,a8,49,0b,40,8b,be,5f,69,40,50,5a,77,7b)
 #define SD_MESSAGE_JOURNAL_STOP    SD_ID128_MAKE(d9,3f,b3,c9,c2,4d,45,1a,97,ce,a6,15,ce,59,c0,0b)
 #define SD_MESSAGE_JOURNAL_DROPPED SD_ID128_MAKE(a5,96,d6,fe,7b,fa,49,94,82,8e,72,30,9e,95,d6,1e)
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif