diff --git a/app-text/namazu/files/namazu-configure.patch b/app-text/namazu/files/namazu-configure.patch
new file mode 100644
index 0000000000000..02b6fcde8dc6f
--- /dev/null
+++ b/app-text/namazu/files/namazu-configure.patch
@@ -0,0 +1,13 @@
+--- a/acinclude.m4
++++ b/acinclude.m4
+@@ -165,7 +165,9 @@
+ [AC_TRY_RUN(
+ changequote(<<, >>)dnl
+ <<
+-main()
++#include <stdlib.h>
++#include <string.h>
++int main(void)
+ {
+   /* Some versions of memcmp are not 8-bit clean.  */
+   char c0 = 0x40, c1 = 0x80, c2 = 0x81;
diff --git a/app-text/namazu/namazu-2.0.21.ebuild b/app-text/namazu/namazu-2.0.21.ebuild
index be73f786452f4..1bb859ef8de6f 100644
--- a/app-text/namazu/namazu-2.0.21.ebuild
+++ b/app-text/namazu/namazu-2.0.21.ebuild
@@ -35,6 +35,7 @@ BDEPEND="nls? ( sys-devel/gettext )"
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-gentoo.patch
+	"${FILESDIR}"/${PN}-configure.patch
 	"${FILESDIR}"/${PN}-emacs-27.patch
 	"${FILESDIR}"/${PN}-perl-5.18.patch
 	"${FILESDIR}"/${PN}-perl-5.26.patch
diff --git a/app-text/namazu/namazu-2.0.22_pre8.ebuild b/app-text/namazu/namazu-2.0.22_pre8.ebuild
index 6dab831697ff9..55d8fa5444e9f 100644
--- a/app-text/namazu/namazu-2.0.22_pre8.ebuild
+++ b/app-text/namazu/namazu-2.0.22_pre8.ebuild
@@ -38,6 +38,7 @@ S="${WORKDIR}"/${MY_P}
 
 PATCHES=(
 	"${FILESDIR}"/${PN}-gentoo.patch
+	"${FILESDIR}"/${PN}-configure.patch
 	"${FILESDIR}"/${PN}-underlinking.patch
 )