diff --git a/libsigrok-internal.h b/libsigrok-internal.h
index e27955ba..6073f4bd 100644
--- a/libsigrok-internal.h
+++ b/libsigrok-internal.h
@@ -21,8 +21,8 @@
   * @internal
   */
 
-#ifndef LIBSIGROK_SIGROK_INTERNAL_H
-#define LIBSIGROK_SIGROK_INTERNAL_H
+#ifndef LIBSIGROK_LIBSIGROK_INTERNAL_H
+#define LIBSIGROK_LIBSIGROK_INTERNAL_H
 
 #include <stdarg.h>
 #include <glib.h>
diff --git a/libsigrok.h b/libsigrok.h
index 6e81c6f6..2fef9507 100644
--- a/libsigrok.h
+++ b/libsigrok.h
@@ -17,8 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef LIBSIGROK_SIGROK_H
-#define LIBSIGROK_SIGROK_H
+#ifndef LIBSIGROK_LIBSIGROK_H
+#define LIBSIGROK_LIBSIGROK_H
 
 #include <stdio.h>
 #include <sys/time.h>
diff --git a/proto.h b/proto.h
index 7ec6ae4f..732dee7e 100644
--- a/proto.h
+++ b/proto.h
@@ -17,8 +17,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef LIBSIGROK_SIGROK_PROTO_H
-#define LIBSIGROK_SIGROK_PROTO_H
+#ifndef LIBSIGROK_PROTO_H
+#define LIBSIGROK_PROTO_H
 
 /**
  * @file