1 files changed, 1 insertions, 0 deletions
diff --git a/socket.c b/socket.c
index 568f598a..d96743c8 100644
--- a/socket.c
+++ b/socket.c
@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>
+#include <ctype.h> /* isspace() */
 #ifdef HAVE_MEMORY_H
 #include <memory.h>
 #endif /* HAVE_MEMORY_H */