diff --git a/jerry-port/config-gt.h b/jerry-port/config-gt.h
index 26ad48d09cc0bfc36ada9843547468a03e846bd1..4512670028733769b28f386c0139029ff7e6c504 100755
--- a/jerry-port/config-gt.h
+++ b/jerry-port/config-gt.h
@@ -11,8 +11,13 @@
 #include "mc_type.h"
 #include "mc_hal_rtc.h"
 
+#ifndef INPUTJS_BUFFER_SIZE
 #define INPUTJS_BUFFER_SIZE (32 * 1024)
+#endif /* INPUTJS_BUFFER_SIZE */
+
+#ifndef SNAPSHOT_BUFFER_SIZE
 #define SNAPSHOT_BUFFER_SIZE (24 * 1024)
+#endif /* SNAPSHOT_BUFFER_SIZE */
 
 // Maximum size for js and snapshot file
 __no_init static uint8_t input_buffer[INPUTJS_BUFFER_SIZE] @ ACE_CACHE_ADDRESS;
diff --git a/jerry-port/config-jupiter.h b/jerry-port/config-jupiter.h
index 1bc8f281ed82a5a65160cbd178b291b6ca6089db..e26b062a28c6cdf8a258e3641a60ed1fcbe730bd 100644
--- a/jerry-port/config-jupiter.h
+++ b/jerry-port/config-jupiter.h
@@ -12,8 +12,14 @@
 #include "ohos_types.h"
 
 // Maximum size for js and snapshot file
+#ifndef INPUTJS_BUFFER_SIZE
 #define INPUTJS_BUFFER_SIZE (32 * 1024)
+#endif /* INPUTJS_BUFFER_SIZE */
+
+#ifndef SNAPSHOT_BUFFER_SIZE
 #define SNAPSHOT_BUFFER_SIZE (24 * 1024)
+#endif /* SNAPSHOT_BUFFER_SIZE */
+
 #define CONVERTION_RATIO (1024)
 #define CONTEXT_SIZE_FOR_TASK (3)