diff --git a/src/openrct2/object/ObjectJsonHelpers.cpp b/src/openrct2/object/ObjectJsonHelpers.cpp
index 4dc75528df..c7da2f99b1 100644
--- a/src/openrct2/object/ObjectJsonHelpers.cpp
+++ b/src/openrct2/object/ObjectJsonHelpers.cpp
@@ -55,7 +55,7 @@ namespace ObjectJsonHelpers
         {
             auto length = g1_calculate_data_size(&orig);
             g1 = orig;
-            g1.offset = (uint8_t*)std::malloc(length);
+            g1.offset = new uint8_t[length];
             std::memcpy(g1.offset, orig.offset, length);
             g1.flags &= ~G1_FLAG_HAS_ZOOM_SPRITE;
         }
@@ -67,9 +67,9 @@ namespace ObjectJsonHelpers
             {
                 auto length = g1_calculate_data_size(orig);
                 g1 = *orig;
-                g1.offset = (uint8_t*)std::malloc(length);
+                g1.offset = new uint8_t[length];
                 std::memcpy(g1.offset, orig->offset, length);
-                if (g1.flags & G1_FLAG_HAS_ZOOM_SPRITE)
+                if ((g1.flags & G1_FLAG_HAS_ZOOM_SPRITE) && g1.zoomed_offset != 0)
                 {
                     // Fetch image for next zoom level
                     next_zoom = std::make_unique<RequiredImage>((uint32_t)(idx - g1.zoomed_offset), getter);
@@ -84,7 +84,7 @@ namespace ObjectJsonHelpers
 
         ~RequiredImage()
         {
-            std::free(g1.offset);
+            delete[] g1.offset;
         }
     };