diff --git a/fuzz/CMakeLists.txt b/fuzz/CMakeLists.txt
index 9a30b3b..025a18c 100644
--- a/fuzz/CMakeLists.txt
+++ b/fuzz/CMakeLists.txt
@@ -154,6 +154,7 @@ set(CORPUS_OTHER
   389974979.fuzz
   391974927.fuzz
   394129398.fuzz
+  394463491.fuzz
 )
 
 set(CORPUS_DIR ${CMAKE_CURRENT_BINARY_DIR}/qpdf_corpus)
diff --git a/fuzz/qpdf_extra/394463491.fuzz b/fuzz/qpdf_extra/394463491.fuzz
new file mode 100644
index 0000000..7a74fe3
--- /dev/null
+++ b/fuzz/qpdf_extra/394463491.fuzz
diff --git a/fuzz/qtest/fuzz.test b/fuzz/qtest/fuzz.test
index 9a784d1..eb943c5 100644
--- a/fuzz/qtest/fuzz.test
+++ b/fuzz/qtest/fuzz.test
@@ -11,7 +11,7 @@ my $td = new TestDriver('fuzz');
 
 my $qpdf_corpus = $ENV{'QPDF_FUZZ_CORPUS'} || die "must set QPDF_FUZZ_CORPUS";
 
-my $n_qpdf_files = 91;       # increment when adding new files
+my $n_qpdf_files = 92;       # increment when adding new files
 
 my @fuzzers = (
     ['ascii85' => 1],
diff --git a/libqpdf/SF_FlateLzwDecode.cc b/libqpdf/SF_FlateLzwDecode.cc
index d7b8c48..433d585 100644
--- a/libqpdf/SF_FlateLzwDecode.cc
+++ b/libqpdf/SF_FlateLzwDecode.cc
@@ -14,6 +14,8 @@ SF_FlateLzwDecode::setDecodeParms(QPDFObjectHandle decode_parms)
         return true;
     }
 
+    auto memory_limit = Pl_Flate::memory_limit();
+
     std::set<std::string> keys = decode_parms.getKeys();
     for (auto const& key: keys) {
         QPDFObjectHandle value = decode_parms.getKey(key);
@@ -29,6 +31,11 @@ SF_FlateLzwDecode::setDecodeParms(QPDFObjectHandle decode_parms)
         } else if (key == "/Columns" || key == "/Colors" || key == "/BitsPerComponent") {
             if (value.isInteger()) {
                 int val = value.getIntValueAsInt();
+                if (memory_limit && static_cast<unsigned int>(val) > memory_limit) {
+                    QPDFLogger::defaultLogger()->warn(
+                        "SF_FlateLzwDecode parameter exceeds PL_Flate memory limit\n");
+                    return false;
+                }
                 if (key == "/Columns") {
                     columns = val;
                 } else if (key == "/Colors") {