diff --git a/qucs/qucs/mouseactions.cpp b/qucs/qucs/mouseactions.cpp
index 32a933528..504b2f9fc 100644
--- a/qucs/qucs/mouseactions.cpp
+++ b/qucs/qucs/mouseactions.cpp
@@ -46,6 +46,7 @@
 #include <QDebug>
 
 #include <limits.h>
+#include <stdint.h>
 #include <stdlib.h>
 
 
diff --git a/qucs/qucs/schematic_element.cpp b/qucs/qucs/schematic_element.cpp
index d30db3f58..763d052c4 100644
--- a/qucs/qucs/schematic_element.cpp
+++ b/qucs/qucs/schematic_element.cpp
@@ -14,6 +14,7 @@
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
+#include <stdint.h>
 #include <stdlib.h>
 #include <limits.h>