diff --git a/core/mandoc/build b/core/mandoc/build
index 11f1bfed..2542c8ef 100755
--- a/core/mandoc/build
+++ b/core/mandoc/build
@@ -1,5 +1,7 @@
 #!/bin/sh -e
 
+patch -p1 < mandoc-no-warn.patch
+
 sed -i 's,"more -s","less",g' main.c
 sed -i "s/CC=.*/CC='$CC'/"    configure
 
@@ -9,18 +11,10 @@ MANDIR=/usr/share/man
 LIBDIR=/usr/lib
 CC="${CC:-gcc}"
 CFLAGS="$CFLAGS"
-MANPATH_DEFAULT=/usr/share/man
 LN="ln -sf"
 EOF
 
-MANPATH_BASE=/usr/share/man ./configure
+./configure
+
 make
-make -j1 DESTDIR="$1" base-install lib-install
-
-# Make binaries writable.
-chmod -v u+w "$1/usr/bin/"*
-
-# Remove all development files.
-rm -rf "$1/usr/include" \
-       "$1/usr/lib" \
-       "$1/usr/share/man/man3"
+make -j1 DESTDIR="$1" base-install
diff --git a/core/mandoc/checksums b/core/mandoc/checksums
index 05dfea01..babcf781 100644
--- a/core/mandoc/checksums
+++ b/core/mandoc/checksums
@@ -1 +1,2 @@
 8219b42cb56fc07b2aa660574e6211ac38eefdbf21f41b698d3348793ba5d8f7  mandoc-1.14.5.tar.gz
+eaff34c03d1b6741cf6b24a394c63ad6096e4391578414b9da986294ee817a25  mandoc-no-warn.patch
diff --git a/core/mandoc/patches/mandoc-no-warn.patch b/core/mandoc/patches/mandoc-no-warn.patch
new file mode 100644
index 00000000..1f49a123
--- /dev/null
+++ b/core/mandoc/patches/mandoc-no-warn.patch
@@ -0,0 +1,13 @@
+diff --git a/main.c b/main.c
+index b91c158..514508a 100644
+--- a/main.c
++++ b/main.c
+@@ -750,8 +750,6 @@ fs_lookup(const struct manpaths *paths, size_t ipath,
+ 	return globres != -1;
+ 
+ found:
+-	warnx("outdated mandoc.db lacks %s(%s) entry, run %s %s",
+-	    name, sec, BINM_MAKEWHATIS, paths->paths[ipath]);
+ 	if (res == NULL) {
+ 		free(file);
+ 		return 1;
diff --git a/core/mandoc/sources b/core/mandoc/sources
index 85f63e7e..d0125188 100644
--- a/core/mandoc/sources
+++ b/core/mandoc/sources
@@ -1 +1,2 @@
 https://fossies.org/linux/misc/mandoc-1.14.5.tar.gz
+patches/mandoc-no-warn.patch