diff --git a/Process.h b/Process.h
index 6c41edc2fdd8cf5400ce6a78980776ca0a6204cb..fda8480a995c7c41798f1487aa26e48d0294eea9 100644
--- a/Process.h
+++ b/Process.h
@@ -9,6 +9,11 @@ Released under the GNU GPL, see the COPYING file
 in the source distribution for its full text.
 */
 
+#ifdef MAJOR_IN_MKDEV
+#elif defined(MAJOR_IN_SYSMACROS) || \
+   (defined(HAVE_SYS_SYSMACROS_H) && HAVE_SYS_SYSMACROS_H)
+#endif
+
 #ifdef __ANDROID__
 #define SYS_ioprio_get __NR_ioprio_get
 #define SYS_ioprio_set __NR_ioprio_set
diff --git a/linux/LinuxProcessList.h b/linux/LinuxProcessList.h
index 5005220a545de19238c088f1af8a75590699b93a..0851a1029fd17d1382dedc3a59ed4f5f9d159c57 100644
--- a/linux/LinuxProcessList.h
+++ b/linux/LinuxProcessList.h
@@ -9,6 +9,11 @@ Released under the GNU GPL, see the COPYING file
 in the source distribution for its full text.
 */
 
+#ifdef MAJOR_IN_MKDEV
+#elif defined(MAJOR_IN_SYSMACROS) || \
+   (defined(HAVE_SYS_SYSMACROS_H) && HAVE_SYS_SYSMACROS_H)
+#endif
+
 #ifdef HAVE_DELAYACCT
 #endif