diff --git a/lib/checkother.cpp b/lib/checkother.cpp
index 91021b6c9..547b997d0 100644
--- a/lib/checkother.cpp
+++ b/lib/checkother.cpp
@@ -34,6 +34,9 @@ namespace {
 
 static bool astIsFloat(const Token *tok, bool unknown)
 {
+    if (tok->str() == ".")
+        return astIsFloat(tok->astOperand2(), unknown);
+
     if (tok->astOperand1() && tok->str() != "?" && astIsFloat(tok->astOperand1(),unknown))
         return true;
     if (tok->astOperand2() && astIsFloat(tok->astOperand2(), unknown))
diff --git a/test/testother.cpp b/test/testother.cpp
index 0f0d2bd7b..5d0f9b23e 100644
--- a/test/testother.cpp
+++ b/test/testother.cpp
@@ -4983,6 +4983,10 @@ private:
               "float f(struct X x) { return x.f == x.f; }");
         ASSERT_EQUALS("", errout.str());
 
+        check("struct X { int i; };\n"
+              "int f(struct X x) { return x.i == x.i; }");
+        ASSERT_EQUALS("[test.cpp:2] -> [test.cpp:2]: (style) Same expression on both sides of '=='.\n", errout.str());
+
         // #5284 - when type is unknown, assume it's float
         check("int f() { return x==x; }");
         ASSERT_EQUALS("", errout.str());