diff --git a/meta-oe/recipes-extended/libconfig/libconfig/0001-Fix-declarations-to-allow-build-with-gcc-15.patch b/meta-oe/recipes-extended/libconfig/libconfig/0001-Fix-declarations-to-allow-build-with-gcc-15.patch
new file mode 100644
index 0000000000..00ceadb10d
--- /dev/null
+++ b/meta-oe/recipes-extended/libconfig/libconfig/0001-Fix-declarations-to-allow-build-with-gcc-15.patch
@@ -0,0 +1,38 @@
+From 0511e285f3c886a388b8e9c6a4829752d60ab44c Mon Sep 17 00:00:00 2001
+From: Rudi Heitbaum <rudi@heitbaum.com>
+Date: Thu, 5 Dec 2024 06:47:40 +0000
+Subject: [PATCH] Fix declarations to allow build with gcc 15
+
+Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
+
+Upstream-Status: Backport [690342b Fix declarations to allow build with gcc 15]
+---
+ lib/grammar.y | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/lib/grammar.y b/lib/grammar.y
+index 87dac00..0e9d0bb 100644
+--- a/lib/grammar.y
++++ b/lib/grammar.y
+@@ -40,8 +40,7 @@
+ #include "wincompat.h"
+ 
+ /* These declarations are provided to suppress compiler warnings. */
+-extern int libconfig_yylex();
+-extern int libconfig_yyget_lineno();
++extern int libconfig_yyget_lineno(void *);
+ 
+ static const char *err_array_elem_type = "mismatched element type in array";
+ static const char *err_duplicate_setting = "duplicate setting name";
+@@ -80,6 +79,11 @@ void libconfig_yyerror(void *scanner, struct parse_context *ctx,
+   char *sval;
+ }
+ 
++%{
++/* These declarations are provided to suppress compiler warnings. */
++extern int libconfig_yylex(YYSTYPE *, void *);
++%}
++
+ %token <ival> TOK_BOOLEAN TOK_INTEGER TOK_HEX
+ %token <llval> TOK_INTEGER64 TOK_HEX64
+ %token <fval> TOK_FLOAT
diff --git a/meta-oe/recipes-extended/libconfig/libconfig_1.7.3.bb b/meta-oe/recipes-extended/libconfig/libconfig_1.7.3.bb
index ad030b8f4a..a4df707dd7 100644
--- a/meta-oe/recipes-extended/libconfig/libconfig_1.7.3.bb
+++ b/meta-oe/recipes-extended/libconfig/libconfig_1.7.3.bb
@@ -7,7 +7,12 @@ SECTION = "libs"
 LICENSE = "LGPL-2.1-only"
 LIC_FILES_CHKSUM = "file://COPYING.LIB;md5=fad9b3332be894bab9bc501572864b29"
 
-SRC_URI = "https://hyperrealm.github.io/libconfig/dist/libconfig-${PV}.tar.gz"
+SRC_URI = "https://hyperrealm.github.io/libconfig/dist/libconfig-${PV}.tar.gz \
+    file://0001-Fix-declarations-to-allow-build-with-gcc-15.patch \
+"
+
+# needed when we modify grammar.y with above patch
+DEPENDS += "bison-native"
 
 UPSTREAM_CHECK_URI = "https://github.com/hyperrealm/libconfig/releases"
 UPSTREAM_CHECK_REGEX = "Version (?P<pver>\d+(\.\d+)+)"