diff --git a/fuzz/CMakeLists.txt b/fuzz/CMakeLists.txt
index 75f0db5a..8f3008d5 100644
--- a/fuzz/CMakeLists.txt
+++ b/fuzz/CMakeLists.txt
@@ -119,6 +119,7 @@ set(CORPUS_OTHER
   68668.fuzz
   68915.fuzz
   69857.fuzz
+  69913.fuzz
 )
 
 set(CORPUS_DIR ${CMAKE_CURRENT_BINARY_DIR}/qpdf_corpus)
diff --git a/fuzz/qpdf_extra/69913.fuzz b/fuzz/qpdf_extra/69913.fuzz
new file mode 100644
index 00000000..978ade90
Binary files /dev/null and b/fuzz/qpdf_extra/69913.fuzz differ
diff --git a/fuzz/qtest/fuzz.test b/fuzz/qtest/fuzz.test
index 34169669..6bcbbde4 100644
--- a/fuzz/qtest/fuzz.test
+++ b/fuzz/qtest/fuzz.test
@@ -21,7 +21,7 @@ my @fuzzers = (
     ['pngpredictor' => 1],
     ['runlength' => 6],
     ['tiffpredictor' => 2],
-    ['qpdf' => 61],             # increment when adding new files
+    ['qpdf' => 62],             # increment when adding new files
     );
 
 my $n_tests = 0;
diff --git a/libqpdf/QPDF.cc b/libqpdf/QPDF.cc
index ada49f3e..f46885a1 100644
--- a/libqpdf/QPDF.cc
+++ b/libqpdf/QPDF.cc
@@ -905,9 +905,8 @@ QPDF::read_xrefEntry(qpdf_offset_t& f1, int& f2, char& type)
     if (QUtil::is_space(*p++) && (*p == 'f' || *p == 'n')) {
         // C++20: [[likely]]
         type = *p;
-        ++p;
-        ++p; // No test for valid line[19].
-        if ((*p == '\n' || *p == '\r') && f1_len == 10 && f2_len == 5) {
+        // No test for valid line[19].
+        if (*(++p) && *(++p) && (*p == '\n' || *p == '\r') && f1_len == 10 && f2_len == 5) {
             // C++20: [[likely]]
             return true;
         }