diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index 4482ebad4e7..e1772825701 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -7573,7 +7573,7 @@ void SymbolDatabase::setValueTypeInTokenList(bool reportDebugWarnings, Token *to
                 else if (tok->previous()->isSigned())
                     valuetype.sign = ValueType::Sign::SIGNED;
                 else if (valuetype.isIntegral() && valuetype.type != ValueType::UNKNOWN_INT)
-                    valuetype.sign = mDefaultSignedness;
+                    valuetype.sign = (valuetype.type == ValueType::Type::CHAR) ? mDefaultSignedness : ValueType::Sign::SIGNED;
                 setValueType(tok, valuetype);
             }
 
diff --git a/test/testcondition.cpp b/test/testcondition.cpp
index db2f41e6da2..35a7205642c 100644
--- a/test/testcondition.cpp
+++ b/test/testcondition.cpp
@@ -6229,6 +6229,28 @@ class TestCondition : public TestFixture {
             "}\n");
         ASSERT_EQUALS("", errout_str());
     }
+
+    void knownConditionFloating() {
+        check("void foo() {\n" // #13363
+              "    float f = 1.0f;\n"
+              "    if (f > 1.00f) {}\n"
+              "    if (f > 1) {}\n"
+              "}\n");
+        ASSERT_EQUALS(
+            "[test.cpp:3]: (style) Condition 'f>1.00f' is always false\n"
+            "[test.cpp:4]: (style) Condition 'f>1' is always false\n",
+            errout_str());
+
+        check("void foo() {\n" // #13363
+              "    float f = 1.0;\n"
+              "    if (f > 1.00) {}\n"
+              "    if (f > 1) {}\n"
+              "}\n");
+        ASSERT_EQUALS(
+            "[test.cpp:3]: (style) Condition 'f>1.00' is always false\n"
+            "[test.cpp:4]: (style) Condition 'f>1' is always false\n",
+            errout_str());
+    }
 };
 
 REGISTER_TEST(TestCondition)