diff --git a/Meta/Lagom/CMakeLists.txt b/Meta/Lagom/CMakeLists.txt
index 7a11fbcb30a..c98f73456f7 100644
--- a/Meta/Lagom/CMakeLists.txt
+++ b/Meta/Lagom/CMakeLists.txt
@@ -31,6 +31,10 @@ if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
         set(LINKER_FLAGS "${LINKER_FLAGS} -fsanitize=fuzzer")
     endif()
 
+    set(ORIGINAL_CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
+    set(ORIGINAL_CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
+    set(ORIGINAL_CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS}")
+
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${LINKER_FLAGS}")
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${LINKER_FLAGS}")
     set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${LINKER_FLAGS}")
diff --git a/Meta/Lagom/Fuzzers/CMakeLists.txt b/Meta/Lagom/Fuzzers/CMakeLists.txt
index dddbe3e521b..9fe96e001d0 100644
--- a/Meta/Lagom/Fuzzers/CMakeLists.txt
+++ b/Meta/Lagom/Fuzzers/CMakeLists.txt
@@ -34,10 +34,11 @@ add_simple_fuzzer(FuzzShell)
 add_simple_fuzzer(FuzzTTF)
 add_simple_fuzzer(FuzzURL)
 
-if (NOT ENABLE_OSS_FUZZ AND NOT ENABLE_FUZZER_SANITIZER)
+if (NOT ENABLE_OSS_FUZZ)
+set(CMAKE_EXE_LINKER_FLAGS "${ORIGINAL_CMAKE_EXE_LINKER_FLAGS} -fsanitize=address")
+set(CMAKE_SHARED_LINKER_FLAGS "${ORIGINAL_CMAKE_SHARED_LINKER_FLAGS} -fsanitize=address")
+set(CMAKE_MODULE_LINKER_FLAGS "${ORIGINAL_CMAKE_MODULE_LINKER_FLAGS} -fsanitize=address")
 add_executable(FuzzilliJs FuzzilliJs.cpp)
-# FIXME: For some reason, these option overrides are ignored and FuzzilliJs gets treated
-#        as a regular fuzzer. Once fixed, please remove the "AND NOT ENABLE_FUZZER_SANITIZER" above.
 target_compile_options(FuzzilliJs
     PRIVATE $<$<C_COMPILER_ID:Clang>:-g -O1 -fsanitize-coverage=trace-pc-guard>
     )
diff --git a/Meta/Lagom/Fuzzers/FuzzilliJs.cpp b/Meta/Lagom/Fuzzers/FuzzilliJs.cpp
index 74f8a894f90..952d8641ad5 100644
--- a/Meta/Lagom/Fuzzers/FuzzilliJs.cpp
+++ b/Meta/Lagom/Fuzzers/FuzzilliJs.cpp
@@ -40,7 +40,10 @@
 #include <string>
 #include <sys/mman.h>
 
+#include <fcntl.h>
+#include <string.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 
 //
 // BEGIN FUZZING CODE
diff --git a/Meta/Lagom/Fuzzers/add-serenity-support-to-fuzzilli.patch b/Meta/Lagom/Fuzzers/add-serenity-support-to-fuzzilli.patch
index a36902dfbbe..a10e7caea48 100644
--- a/Meta/Lagom/Fuzzers/add-serenity-support-to-fuzzilli.patch
+++ b/Meta/Lagom/Fuzzers/add-serenity-support-to-fuzzilli.patch
@@ -1,8 +1,8 @@
 diff --git a/Sources/FuzzilliCli/Profiles/Profile.swift b/Sources/FuzzilliCli/Profiles/Profile.swift
-index 6d8a795..a506d41 100644
+index 900b4e2..c916e84 100644
 --- a/Sources/FuzzilliCli/Profiles/Profile.swift
 +++ b/Sources/FuzzilliCli/Profiles/Profile.swift
-@@ -32,6 +32,33 @@ struct Profile {
+@@ -33,6 +33,35 @@ struct Profile {
      let additionalBuiltins: [String: Type]
  }
  
@@ -25,6 +25,8 @@ index 6d8a795..a506d41 100644
 +    crashTests: ["fuzzilli('FUZZILLI_CRASH', 0)", "fuzzilli('FUZZILLI_CRASH', 1)"],
 +
 +    additionalCodeGenerators: WeightedList<CodeGenerator>([]),
++
++    additionalProgramTemplates: WeightedList<ProgramTemplate>([]),
 +    
 +    disabledCodeGenerators: [],
 +
@@ -36,7 +38,7 @@ index 6d8a795..a506d41 100644
  let profiles = [
      "qjs": qjsProfile,
      "jsc": jscProfile,
-@@ -39,4 +66,5 @@ let profiles = [
+@@ -40,4 +69,5 @@ let profiles = [
      "v8": v8Profile,
      "duktape": duktapeProfile,
      "jerryscript": jerryscriptProfile,