diff --git a/libs/libc/gdbstub/Kconfig b/libs/libc/gdbstub/Kconfig
index a3a2ee1b2c..0d9f46d828 100644
--- a/libs/libc/gdbstub/Kconfig
+++ b/libs/libc/gdbstub/Kconfig
@@ -17,4 +17,10 @@ config LIB_GDBSTUB_DEBUG
 	---help---
 		Add debug info to gdbstub
 
+config LIB_GDBSTUB_PKTSIZE
+  int "Gdbstub packet size"
+	default 32768
+	---help---
+		The size of the gdbstub packet buffer.
+
 endif
diff --git a/libs/libc/gdbstub/lib_gdbstub.c b/libs/libc/gdbstub/lib_gdbstub.c
index 4d78e1baf9..fd8f73997d 100644
--- a/libs/libc/gdbstub/lib_gdbstub.c
+++ b/libs/libc/gdbstub/lib_gdbstub.c
@@ -50,6 +50,8 @@
 #  define GDB_ASSERT() do {} while (0)
 #endif
 
+#define BUFSIZE CONFIG_LIB_GDBSTUB_PKTSIZE
+
 /****************************************************************************
  * Private Types
  ****************************************************************************/
@@ -66,7 +68,7 @@ struct gdb_state_s
   FAR void *last_stopaddr;                /* Last stop address */
   pid_t pid;                              /* Gdb current thread */
   FAR char *pkt_next;                     /* Pointer to next byte in packet */
-  char pkt_buf[1024];                     /* Packet buffer */
+  char pkt_buf[BUFSIZE];                  /* Packet buffer */
   size_t pkt_len;                         /* Packet send and receive length */
   uint8_t running_regs[XCPTCONTEXT_SIZE]; /* Registers of running thread */
   size_t size;                            /* Size of registers */