diff --git a/src/openrct2/drawing/Drawing.h b/src/openrct2/drawing/Drawing.h
index 35f0c4c0e5..1d67b5f213 100644
--- a/src/openrct2/drawing/Drawing.h
+++ b/src/openrct2/drawing/Drawing.h
@@ -79,20 +79,20 @@ struct GamePalette
 
 struct rct_g1_element
 {
-    uint8_t* offset;       // 0x00
-    int16_t width;         // 0x04
-    int16_t height;        // 0x06
-    int16_t x_offset;      // 0x08
-    int16_t y_offset;      // 0x0A
-    uint16_t flags;        // 0x0C
-    int32_t zoomed_offset; // 0x0E
+    uint8_t* offset = nullptr; // 0x00
+    int16_t width = 0;         // 0x04
+    int16_t height = 0;        // 0x06
+    int16_t x_offset = 0;      // 0x08
+    int16_t y_offset = 0;      // 0x0A
+    uint16_t flags = 0;        // 0x0C
+    int32_t zoomed_offset = 0; // 0x0E
 };
 
 #pragma pack(push, 1)
 struct rct_g1_header
 {
-    uint32_t num_entries;
-    uint32_t total_size;
+    uint32_t num_entries = 0;
+    uint32_t total_size = 0;
 };
 assert_struct_size(rct_g1_header, 8);
 #pragma pack(pop)