diff --git a/common/pcx.c b/common/pcx.c
index 7bd5a7a..92e6e2a 100644
--- a/common/pcx.c
+++ b/common/pcx.c
@@ -27,6 +27,7 @@
 	Boston, MA  02111-1307, USA
 */
 
+#include <string.h>
 #include <stdlib.h>
 #include <qtypes.h>
 #include <quakeio.h>