diff --git CMakeLists.txt CMakeLists.txt
index 8d7084e..e081532 100644
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -162,12 +162,14 @@ else()
             src/crypto/common/LinuxMemory.cpp
             )
 
         set(EXTRA_LIBS pthread rt dl)
     elseif (XMRIG_OS_FREEBSD)
         set(EXTRA_LIBS kvm pthread)
+    elseif (XMRIG_OS_OPENBSD)
+        set(EXTRA_LIBS kvm pthread)
     endif()
 endif()
 
 add_definitions(/D__STDC_FORMAT_MACROS)
 add_definitions(/DUNICODE)
 
diff --git cmake/os.cmake cmake/os.cmake
index 0270cc9..41e97fc 100644
--- cmake/os.cmake
+++ cmake/os.cmake
@@ -14,12 +14,14 @@ else()
     if (ANDROID OR CMAKE_SYSTEM_NAME MATCHES "Android")
         set(XMRIG_OS_ANDROID ON)
     elseif(CMAKE_SYSTEM_NAME MATCHES "Linux")
         set(XMRIG_OS_LINUX ON)
     elseif(CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
         set(XMRIG_OS_FREEBSD ON)
+    elseif(CMAKE_SYSTEM_NAME STREQUAL OpenBSD)
+	set(XMRIG_OS_OPENBSD ON)
     endif()
 endif()
 
 
 if (XMRIG_OS_WIN)
     add_definitions(/DWIN32)
diff --git src/base/kernel/Platform_unix.cpp src/base/kernel/Platform_unix.cpp
index b6ca17e..f3ddaa3 100644
--- src/base/kernel/Platform_unix.cpp
+++ src/base/kernel/Platform_unix.cpp
@@ -84,21 +84,25 @@ char *xmrig::Platform::createUserAgent()
 }
 
 
 #ifndef XMRIG_FEATURE_HWLOC
 bool xmrig::Platform::setThreadAffinity(uint64_t cpu_id)
 {
+#   ifdef __OpenBSD__
+    return true;
+#   else
     cpu_set_t mn;
     CPU_ZERO(&mn);
     CPU_SET(cpu_id, &mn);
 
 #   ifndef __ANDROID__
     return pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &mn) == 0;
 #   else
     return sched_setaffinity(gettid(), sizeof(cpu_set_t), &mn) == 0;
 #   endif
+#   endif
 }
 #endif
 
 
 uint32_t xmrig::Platform::setTimerResolution(uint32_t resolution)
 {
diff --git src/crypto/common/VirtualMemory_unix.cpp src/crypto/common/VirtualMemory_unix.cpp
index 0c77ba0..ab76c89 100644
--- src/crypto/common/VirtualMemory_unix.cpp
+++ src/crypto/common/VirtualMemory_unix.cpp
@@ -78,12 +78,14 @@ void *xmrig::VirtualMemory::allocateExecutableMemory(size_t size)
 void *xmrig::VirtualMemory::allocateLargePagesMemory(size_t size)
 {
 #   if defined(__APPLE__)
     void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, VM_FLAGS_SUPERPAGE_SIZE_2MB, 0);
 #   elif defined(__FreeBSD__)
     void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_ALIGNED_SUPER | MAP_PREFAULT_READ, -1, 0);
+#   elif defined(__OpenBSD__)
+    void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
 #   else
     void *mem = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, 0, 0);
 #   endif
 
     return mem == MAP_FAILED ? nullptr : mem;
 }