diff --git a/src/common/sy_common.h b/src/common/sy_common.h
index 7c00157..60a3d2e 100644
--- a/src/common/sy_common.h
+++ b/src/common/sy_common.h
@@ -49,8 +49,8 @@ enum sy_format {
 #define __SY_POINT__
 typedef struct sy_point
 {
-	int x_;
-	int y_;
+	int x_{0};
+	int y_{0};
 	sy_point(int m_x, int m_y) :x_(m_x), y_(m_y) {};
 	sy_point() {};
 } sy_point;
@@ -62,10 +62,10 @@ typedef struct sy_point
 #define __SY_RECT__
 typedef struct sy_rect
 {
-	int left_;
-	int top_;
-	int width_;
-	int height_;
+	int left_{0};
+	int top_{0};
+	int width_{0};
+	int height_{0};
 	sy_rect(int m_left, int m_top, int m_width, int m_height) :left_(m_left), top_(m_top), width_(m_width), height_(m_height) {};
 	sy_rect() {};
 } sy_rect;
@@ -77,10 +77,10 @@ typedef struct sy_rect
 #define __SY_IMG__
 typedef struct sy_img
 {
-	unsigned char * data_;
-	int w_;
-	int h_;
-	int c_;
+	unsigned char * data_{nullptr};
+	int w_{0};
+	int h_{0};
+	int c_{0};
 	void set_data(int m_w, int m_h, int m_c, unsigned char * m_data)
 	{
 		w_ = m_w;