diff --git a/lib/token.cpp b/lib/token.cpp
index 0ad96387d61..f047cb456d6 100644
--- a/lib/token.cpp
+++ b/lib/token.cpp
@@ -143,10 +143,13 @@ void Token::update_property_info()
                 tokType(eKeyword);
             else if (mTokType != eVariable && mTokType != eFunction && mTokType != eType && mTokType != eKeyword)
                 tokType(eName);
-        } else if (std::isdigit((unsigned char)mStr[0]) || (mStr.length() > 1 && mStr[0] == '-' && std::isdigit((unsigned char)mStr[1])))
-            tokType(eNumber);
-        else if (mStr == "=" || mStr == "<<=" || mStr == ">>=" ||
-                 (mStr.size() == 2U && mStr[1] == '=' && std::strchr("+-*/%&^|", mStr[0])))
+        } else if (std::isdigit((unsigned char)mStr[0]) || (mStr.length() > 1 && mStr[0] == '-' && std::isdigit((unsigned char)mStr[1]))) {
+            if (MathLib::isInt(mStr) || MathLib::isFloat(mStr))
+                tokType(eNumber);
+            else
+                tokType(eName); // assume it is a user defined literal
+        } else if (mStr == "=" || mStr == "<<=" || mStr == ">>=" ||
+                   (mStr.size() == 2U && mStr[1] == '=' && std::strchr("+-*/%&^|", mStr[0])))
             tokType(eAssignmentOp);
         else if (mStr.size() == 1 && mStr.find_first_of(",[]()?:") != std::string::npos)
             tokType(eExtendedOp);
diff --git a/test/testtoken.cpp b/test/testtoken.cpp
index 60f03db1a57..64097d09653 100644
--- a/test/testtoken.cpp
+++ b/test/testtoken.cpp
@@ -637,8 +637,11 @@ class TestToken : public TestFixture {
         givenACodeSampleToTokenize nonNumeric("abc", true);
         ASSERT_EQUALS(false, Token::Match(nonNumeric.tokens(), "%num%"));
 
-        givenACodeSampleToTokenize binary("101010b", true);
-        ASSERT_EQUALS(true, Token::Match(binary.tokens(), "%num%"));
+        givenACodeSampleToTokenize msLiteral("5ms", true); // #11438
+        ASSERT_EQUALS(false, Token::Match(msLiteral.tokens(), "%num%"));
+
+        givenACodeSampleToTokenize sLiteral("3s", true);
+        ASSERT_EQUALS(false, Token::Match(sLiteral.tokens(), "%num%"));
 
         givenACodeSampleToTokenize octal("0123", true);
         ASSERT_EQUALS(true, Token::Match(octal.tokens(), "%num%"));
@@ -652,9 +655,6 @@ class TestToken : public TestFixture {
         givenACodeSampleToTokenize floatingPoint("0.0f", true);
         ASSERT_EQUALS(true, Token::Match(floatingPoint.tokens(), "%num%"));
 
-        givenACodeSampleToTokenize doublePrecision("0.0d", true);
-        ASSERT_EQUALS(true, Token::Match(doublePrecision.tokens(), "%num%"));
-
         givenACodeSampleToTokenize signedLong("0L", true);
         ASSERT_EQUALS(true, Token::Match(signedLong.tokens(), "%num%"));