diff --git a/Tests/LibGfx/TestImageDecoder.cpp b/Tests/LibGfx/TestImageDecoder.cpp
index 35f2915ba1..f61ae92013 100644
--- a/Tests/LibGfx/TestImageDecoder.cpp
+++ b/Tests/LibGfx/TestImageDecoder.cpp
@@ -270,7 +270,8 @@ TEST_CASE(test_jpeg_malformed_header)
 TEST_CASE(test_jpeg_malformed_frame)
 {
     Array test_inputs = {
-        TEST_INPUT("jpg/oss-fuzz-testcase-62584.jpg"sv)
+        TEST_INPUT("jpg/oss-fuzz-testcase-62584.jpg"sv),
+        TEST_INPUT("jpg/oss-fuzz-testcase-63815.jpg"sv)
     };
 
     for (auto test_input : test_inputs) {
diff --git a/Tests/LibGfx/test-inputs/jpg/oss-fuzz-testcase-63815.jpg b/Tests/LibGfx/test-inputs/jpg/oss-fuzz-testcase-63815.jpg
new file mode 100644
index 0000000000..b28c6d380c
Binary files /dev/null and b/Tests/LibGfx/test-inputs/jpg/oss-fuzz-testcase-63815.jpg differ
diff --git a/Userland/Libraries/LibGfx/ImageFormats/JPEGLoader.cpp b/Userland/Libraries/LibGfx/ImageFormats/JPEGLoader.cpp
index 3d2487ca4a..01668dc037 100644
--- a/Userland/Libraries/LibGfx/ImageFormats/JPEGLoader.cpp
+++ b/Userland/Libraries/LibGfx/ImageFormats/JPEGLoader.cpp
@@ -296,11 +296,8 @@ public:
     {
         m_bit_offset += count;
 
-        if (m_bit_offset > bits_in_reservoir) {
-            // FIXME: I can't find a test case for that so let's leave it for later
-            //        instead of inserting an hard-to-find bug.
-            TODO();
-        }
+        if (m_bit_offset > bits_in_reservoir)
+            TRY(refill_reservoir());
 
         return {};
     }