diff --git a/lib/checkio.cpp b/lib/checkio.cpp
index 9849754da..5d6509789 100644
--- a/lib/checkio.cpp
+++ b/lib/checkio.cpp
@@ -787,7 +787,8 @@ void CheckIO::checkWrongPrintfScanfArguments()
                                                         invalidScanfArgTypeError_int(tok, numFormat, specifier, &argInfo, false);
                                                     break;
                                                 case 'z':
-                                                    if (argInfo.typeToken->originalName() != "size_t")
+                                                    if (argInfo.typeToken->originalName() != "ptrdiff_t" &&
+                                                        argInfo.typeToken->originalName() != "ssize_t")
                                                         invalidScanfArgTypeError_int(tok, numFormat, specifier, &argInfo, false);
                                                     break;
                                                 case 't':
@@ -1625,7 +1626,10 @@ void CheckIO::invalidScanfArgTypeError_int(const Token* tok, unsigned int numFor
         else
             errmsg << "intmax_t";
     } else if (specifier[0] == 'z') {
-        errmsg << "size_t";
+        if (specifier[1] == 'd')
+            errmsg << "ptrdiff_t";
+        else
+            errmsg << "size_t";
     } else if (specifier[0] == 't') {
         errmsg << (isUnsigned ? "unsigned " : "") << "ptrdiff_t";
     } else if (specifier[0] == 'L') {
diff --git a/test/testio.cpp b/test/testio.cpp
index 5398e9614..254dd0f8b 100644
--- a/test/testio.cpp
+++ b/test/testio.cpp
@@ -1323,6 +1323,16 @@ private:
               "}\n");
         ASSERT_EQUALS("", errout.str());
 
+        check("void g() {\n" // #5348
+              "    size_t s1;\n"
+              "    ptrdiff_t s2;\n"
+              "    ssize_t s3;\n"
+              "    scanf(\"%zd\", &s1);\n"
+              "    scanf(\"%zd\", &s2);\n"
+              "    scanf(\"%zd\", &s3);\n"
+              "}\n");
+        ASSERT_EQUALS("[test.cpp:5]: (warning) %zd in format string (no. 1) requires 'ptrdiff_t *' but the argument type is 'size_t * {aka unsigned long *}'.\n", errout.str());
+
     }
 
     void testPrintfArgument() {