diff --git a/src/tools/nav_export/pcb.h b/src/tools/nav_export/pcb.h
index 3b7f1fdb..701042fe 100644
--- a/src/tools/nav_export/pcb.h
+++ b/src/tools/nav_export/pcb.h
@@ -3,6 +3,7 @@
 
 #include <stdint.h>
 #include <vector>
+#include <cstring>
 
 struct PCB_HEADER
 {
@@ -172,4 +173,4 @@ struct PCB_LIST_FILE
   PCB_LIST_BASE_ENTRY entry;
   std::vector< PCB_LIST_ENTRY > entries;
 };
-#endif
\ No newline at end of file
+#endif
diff --git a/src/tools/pcb_reader/pcb.h b/src/tools/pcb_reader/pcb.h
index 647c56ca..fb8c8adf 100644
--- a/src/tools/pcb_reader/pcb.h
+++ b/src/tools/pcb_reader/pcb.h
@@ -3,6 +3,7 @@
 
 #include <stdint.h>
 #include <vector>
+#include <cstring>
 
 struct PCB_HEADER
 {
@@ -173,4 +174,4 @@ struct PCB_LIST_FILE
   PCB_LIST_BASE_ENTRY entry;
   std::vector< PCB_LIST_ENTRY > entries;
 };
-#endif
\ No newline at end of file
+#endif