diff --git a/core/iwasm/interpreter/wasm_loader.c b/core/iwasm/interpreter/wasm_loader.c
index 3488618b6..9aab9febd 100644
--- a/core/iwasm/interpreter/wasm_loader.c
+++ b/core/iwasm/interpreter/wasm_loader.c
@@ -4628,7 +4628,7 @@ load_data_segment_section(const uint8 *buf, const uint8 *buf_end,
     bool is_passive = false;
     uint32 mem_flag;
 #endif
-    uint8 mem_offset_type;
+    uint8 mem_offset_type = VALUE_TYPE_I32;
 
     read_leb_uint32(p, p_end, data_seg_count);
 
diff --git a/core/iwasm/interpreter/wasm_mini_loader.c b/core/iwasm/interpreter/wasm_mini_loader.c
index de103f950..d5282c675 100644
--- a/core/iwasm/interpreter/wasm_mini_loader.c
+++ b/core/iwasm/interpreter/wasm_mini_loader.c
@@ -1776,7 +1776,7 @@ load_data_segment_section(const uint8 *buf, const uint8 *buf_end,
     bool is_passive = false;
     uint32 mem_flag;
 #endif
-    uint8 mem_offset_type;
+    uint8 mem_offset_type = VALUE_TYPE_I32;
 
     read_leb_uint32(p, p_end, data_seg_count);