diff --git a/CMakeLists.txt b/CMakeLists.txt
index d984dd1..32d46b3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,7 +36,16 @@ target_compile_definitions(QEFI PRIVATE QEFI_LIBRARY)
 
 find_package(PkgConfig)
 if(PkgConfig_FOUND)
-    pkg_check_modules(EFIVAR efivar)
+    pkg_check_modules(EFIVAR efivar>=0.15)
+    if(NOT DEFINED EFIVAR_FOUND)
+        # Find and link efivar<0.15: no mode
+        pkg_check_modules(EFIVAR efivar)
+        if(EFIVAR_FOUND)
+            # Consider it as an old lib (without mode and return non-zero)
+            # TODO(Inoki): to check https://github.com/rhboot/efivar/commit/7bd2e309aeec210509d215c803a762725591ccc7
+            add_definitions(-DEFIVAR_WITHOUT_MODE)
+        endif()
+    endif()
 endif()
 
 if(APP_DATA_DUMMY_BACKEND)
@@ -58,6 +67,13 @@ if(USE_EFIVAR_OLD_API)
     add_definitions(-DEFIVAR_OLD_API)
 endif()
 
+if(PATCH_FREEBSD_EFIVAR)
+    # Patch efivar 0.15 build for FreeBSD
+    # TODO(Inoki): check 0.15 build for FreeBSD
+    add_definitions(-DEFIVAR_FREEBSD_PATCH)
+    target_link_libraries(QEFI PRIVATE geom)
+endif()
+
 install(
     TARGETS QEFI
     EXPORT QEFITargets
diff --git a/qefi.cpp b/qefi.cpp
index f197ef2..9a32e93 100644
--- a/qefi.cpp
+++ b/qefi.cpp
@@ -686,6 +686,10 @@ extern "C" {
 #include <efivar.h>
 #endif
 #include <unistd.h>
+
+#ifdef EFIVAR_FREEBSD_PATCH
+efi_guid_t efi_guid_zero = {0};
+#endif
 }
 
 bool qefi_is_available()
@@ -822,7 +826,7 @@ void qefi_set_variable_uint16(QUuid uuid, QString name, quint16 value)
     *((uint16_t *)buffer) = qToLittleEndian<quint16>(value);
     return_code = efi_set_variable(guid, c_name, buffer, 2,
                                    default_write_attribute
-#ifndef EFIVAR_OLD_API
+#ifndef EFIVAR_WITHOUT_MODE
                                  , 0644
 #endif
                                    );
@@ -848,7 +852,7 @@ void qefi_set_variable(QUuid uuid, QString name, QByteArray value)
 
     return_code = efi_set_variable(guid, c_name, (uint8_t *)value.data(), value.size(),
                                    default_write_attribute
-#ifndef EFIVAR_OLD_API
+#ifndef EFIVAR_WITHOUT_MODE
                                  , 0644
 #endif
                                    );