diff --git a/FIXES b/FIXES
index 3bb1e4b..1e8e2f4 100644
--- a/FIXES
+++ b/FIXES
@@ -25,6 +25,10 @@ THIS SOFTWARE.
 This file lists all bug fixes, changes, etc., made since the AWK book
 was sent to the printers in August, 1987.
 
+October 24, 2019:
+	Import second round of code cleanups from NetBSD. Much thanks
+	to Christos Zoulas (Github user zoulasc). Merges PR 53.
+
 October 17, 2019:
 	Import code cleanups from NetBSD. Much thanks to Christos
 	Zoulas (Github user zoulasc). Merges PR 51.
diff --git a/awk.h b/awk.h
index c7bfacc..fa76ffc 100644
--- a/awk.h
+++ b/awk.h
@@ -23,6 +23,7 @@ THIS SOFTWARE.
 ****************************************************************/
 
 #include <assert.h>
+#include <stdint.h>
 
 typedef double	Awkfloat;
 
diff --git a/main.c b/main.c
index fc0dd7b..27dd6cf 100644
--- a/main.c
+++ b/main.c
@@ -22,7 +22,7 @@ ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
 THIS SOFTWARE.
 ****************************************************************/
 
-const char	*version = "version 20191017";
+const char	*version = "version 20191024";
 
 #define DEBUG
 #include <stdio.h>
diff --git a/makefile b/makefile
index afaa02f..1843444 100644
--- a/makefile
+++ b/makefile
@@ -30,7 +30,7 @@ CFLAGS = -O2
 #CC = gcc -Wall -g -Wwrite-strings
 #CC = gcc -O4 -Wall -pedantic -fno-strict-aliasing
 #CC = gcc -fprofile-arcs -ftest-coverage # then gcov f1.c; cat f1.c.gcov
-HOSTCC = gcc -g -Wall -pedantic
+HOSTCC = gcc -g -Wall -pedantic -Wcast-qual
 CC = $(HOSTCC)  # change this is cross-compiling.
 
 # yacc options.  pick one; this varies a lot by system.