diff --git a/lib/checkassignif.cpp b/lib/checkassignif.cpp
index 7e2062d2c..fcf1f0273 100644
--- a/lib/checkassignif.cpp
+++ b/lib/checkassignif.cpp
@@ -117,7 +117,11 @@ void CheckAssignIf::comparisonError(const Token *tok, int value1, const std::str
     std::ostringstream expression;
     expression << std::hex << "(X & 0x" << value1 << ") " << op << " 0x" << value2;
 
-    const std::string errmsg("Expression '" + expression.str() + "' is always " + (result?"true":"false") + ". Look again at the constants.");
+    const std::string errmsg("Expression '" + expression.str() + "' is always " + (result?"true":"false") + "\n"
+                             "The expression '" + expression.str() + "' is always " + (result?"true":"false") +
+                             ". Check carefully constants and operators used, these errors might be hard to "
+                             "spot sometimes. In case of complex expression it might help to split it to "
+                             "separate expressions.");
 
     reportError(tok, Severity::style, "comparisonError", errmsg);
 }
diff --git a/test/testassignif.cpp b/test/testassignif.cpp
index a8ab3a419..aee94dafd 100644
--- a/test/testassignif.cpp
+++ b/test/testassignif.cpp
@@ -94,19 +94,19 @@ private:
               "{\n"
               "    if (x & 4 == 3);\n"
               "}\n");
-        ASSERT_EQUALS("[test.cpp:3]: (style) Expression '(X & 0x4) == 0x3' is always false. Look again at the constants.\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:3]: (style) Expression '(X & 0x4) == 0x3' is always false\n", errout.str());
 
         check("void foo(int x)\n"
               "{\n"
               "    if ((x & 4) == 3);\n"
               "}\n");
-        ASSERT_EQUALS("[test.cpp:3]: (style) Expression '(X & 0x4) == 0x3' is always false. Look again at the constants.\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:3]: (style) Expression '(X & 0x4) == 0x3' is always false\n", errout.str());
 
         check("void foo(int x)\n"
               "{\n"
               "    if (x & 4 != 3);\n"
               "}\n");
-        ASSERT_EQUALS("[test.cpp:3]: (style) Expression '(X & 0x4) != 0x3' is always true. Look again at the constants.\n", errout.str());
+        ASSERT_EQUALS("[test.cpp:3]: (style) Expression '(X & 0x4) != 0x3' is always true\n", errout.str());
     }
 
     void multicompare() {