diff --git a/src/modules/temperature/e_mod_tempget.c b/src/modules/temperature/e_mod_tempget.c
index cadbc4daa..92fd97cf2 100644
--- a/src/modules/temperature/e_mod_tempget.c
+++ b/src/modules/temperature/e_mod_tempget.c
@@ -127,7 +127,7 @@ init(Tempthread *tth)
                   break;
                }
           }
-#elif __OpenBSD__
+#elif defined(__OpenBSD__)
         extn->mib[0] = CTL_HW;
         extn->mib[1] = HW_SENSORS;