diff --git a/include/haproxy/compiler.h b/include/haproxy/compiler.h
index c19d2c46a..fc7679e8a 100644
--- a/include/haproxy/compiler.h
+++ b/include/haproxy/compiler.h
@@ -523,4 +523,15 @@
 #define __has_feature(x) 0
 #endif
 
+/* gcc 15 throws warning if fixed-size char array does not contain a terminating
+ * NUL. gcc has an attribute 'nonstring', which allows to suppress this warning
+ * for such array declarations. But it's not the case for clang and other
+ * compilers.
+ */
+#if __has_attribute(nonstring)
+#define __nonstring __attribute__ ((nonstring))
+#else
+#define __nonstring
+#endif
+
 #endif /* _HAPROXY_COMPILER_H */
diff --git a/src/tools.c b/src/tools.c
index ce927f90c..5cd89be9f 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -65,6 +65,7 @@ extern void *__elf_aux_vector;
 #include <haproxy/api.h>
 #include <haproxy/applet.h>
 #include <haproxy/chunk.h>
+#include <haproxy/compiler.h>
 #include <haproxy/dgram.h>
 #include <haproxy/global.h>
 #include <haproxy/hlua.h>
@@ -2038,7 +2039,7 @@ int addr_is_local(const struct netns_entry *ns,
  *
  * Return the address of the \0 character, or NULL on error
  */
-const char hextab[16] = "0123456789ABCDEF";
+const char hextab[16] __nonstring = "0123456789ABCDEF";
 char *encode_string(char *start, char *stop,
 		    const char escape, const long *map,
 		    const char *string)