diff --git a/lib/libpam/openpam_configure.c b/lib/libpam/openpam_configure.c
index 3569a64..d64c455 100644
--- a/lib/libpam/openpam_configure.c
+++ b/lib/libpam/openpam_configure.c
@@ -41,7 +41,6 @@
 
 #include <sys/param.h>
 
-#include <ctype.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/lib/libpam/openpam_readline.c b/lib/libpam/openpam_readline.c
index 9922c42..a404050 100644
--- a/lib/libpam/openpam_readline.c
+++ b/lib/libpam/openpam_readline.c
@@ -39,7 +39,6 @@
 # include "config.h"
 #endif
 
-#include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
 
diff --git a/lib/libpam/openpam_ttyconv.c b/lib/libpam/openpam_ttyconv.c
index 5a22937..aafae51 100644
--- a/lib/libpam/openpam_ttyconv.c
+++ b/lib/libpam/openpam_ttyconv.c
@@ -41,7 +41,6 @@
 
 #include <sys/types.h>
 
-#include <ctype.h>
 #include <errno.h>
 #include <setjmp.h>
 #include <signal.h>