diff --git a/doc/man.md.j2 b/doc/man.md.j2
index 926a1cbb..13d3fa8e 100644
--- a/doc/man.md.j2
+++ b/doc/man.md.j2
@@ -163,7 +163,7 @@ file.
 **-U \| \--unique**
 
 :   Conky won't start if another Conky process is already running. Implemented
-    only for Linux, FreeBSD, NetBSD and Haiku.
+    only for Linux, FreeBSD, NetBSD, OpenBSD and Haiku.
 
 **-v \| -V \| \--version** 
 
diff --git a/src/conky.cc b/src/conky.cc
index d8ca6946..e7db9bb1 100644
--- a/src/conky.cc
+++ b/src/conky.cc
@@ -2112,9 +2112,9 @@ void set_current_config() {
 const char *getopt_string =
     "vVqdDSs:t:u:i:hc:p:"
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__) || defined(__NetBSD__)
+    defined(__HAIKU__) || defined(__NetBSD__) || defined(__OpenBSD__)
     "U"
-#endif /* Linux || FreeBSD || Haiku || NetBSD */
+#endif /* Linux || FreeBSD || Haiku || NetBSD || OpenBSD */
 #ifdef BUILD_X11
     "x:y:w:a:X:m:f:"
 #ifdef OWN_WINDOW
@@ -2146,9 +2146,9 @@ const struct option longopts[] = {
     {"text", 1, nullptr, 't'},          {"interval", 1, nullptr, 'u'},
     {"pause", 1, nullptr, 'p'},
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__) || defined(__NetBSD__)
+    defined(__HAIKU__) || defined(__NetBSD__) || defined(__OpenBSD__)
     {"unique", 0, nullptr, 'U'},
-#endif /* Linux || FreeBSDi || Haiku || NetBSD */
+#endif /* Linux || FreeBSD || Haiku || NetBSD || OpenBSD */
     {nullptr, 0, nullptr, 0}
 };
 
diff --git a/src/data/os/openbsd.cc b/src/data/os/openbsd.cc
index c45519fc..13c379da 100644
--- a/src/data/os/openbsd.cc
+++ b/src/data/os/openbsd.cc
@@ -444,3 +444,8 @@ void prepare_update() {}
 int get_entropy_avail(unsigned int *val) { return 1; }
 
 int get_entropy_poolsize(unsigned int *val) { return 1; }
+
+bool is_conky_already_running() {
+  return bsdcommon::is_conky_already_running();
+}
+
diff --git a/src/data/os/openbsd.h b/src/data/os/openbsd.h
index b08c8756..6067b2ac 100644
--- a/src/data/os/openbsd.h
+++ b/src/data/os/openbsd.h
@@ -30,4 +30,6 @@ typedef struct apm_power_info *apm_info_t;
 int get_entropy_avail(unsigned int *);
 int get_entropy_poolsize(unsigned int *);
 
+bool is_conky_already_running();
+
 #endif /*OPENBSD_H_*/
diff --git a/src/main.cc b/src/main.cc
index 2a557100..002d4523 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -56,6 +56,10 @@
 #include "data/os/netbsd.h"
 #endif /* NetBSD */
 
+#if defined(__OpenBSD__)
+#include "data/os/openbsd.h"
+#endif /* OpenBSD */
+
 #if defined(__HAIKU__)
 #include "data/os/haiku.h"
 #endif /* Haiku */
@@ -282,9 +286,9 @@ static void print_help(const char *prog_name) {
          "   -p, --pause=SECS          pause for SECS seconds at startup "
          "before doing anything\n"
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__) || defined(__NetBSD__)
+    defined(__HAIKU__) || defined(__NetBSD__) || defined(__OpenBSD__)
          "   -U, --unique              only one conky process can be created\n"
-#endif /* Linux || FreeBSD || Haiku || NetBSD */
+#endif /* Linux || FreeBSD || Haiku || NetBSD || OpenBSD */
          , prog_name);
 }
 
@@ -368,23 +372,23 @@ int main(int argc, char **argv) {
         break;
 #endif /* BUILD_X11 */
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__) || defined(__NetBSD__)
+    defined(__HAIKU__) || defined(__NetBSD__) || defined(__OpenBSD__)
       case 'U':
         unique_process = true;
         break;
-#endif /* Linux || FreeBSD || Haiku || NetBSD */
+#endif /* Linux || FreeBSD || Haiku || NetBSD || OpenBSD */
       case '?':
         return EXIT_FAILURE;
     }
   }
 
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
-    defined(__HAIKU__) || defined(__NetBSD__)
+    defined(__HAIKU__) || defined(__NetBSD__) || defined(__OpenBSD__)
   if (unique_process && is_conky_already_running()) {
     NORM_ERR("already running");
     return 0;
   }
-#endif /* Linux || FreeBSD || Haiku */
+#endif /* Linux || FreeBSD || Haiku || NetBSD || OpenBSD */
 
   try {
     set_current_config();