diff --git a/lib/checkunusedvar.cpp b/lib/checkunusedvar.cpp
index 7a75e60b1..87a92dfd2 100644
--- a/lib/checkunusedvar.cpp
+++ b/lib/checkunusedvar.cpp
@@ -1270,6 +1270,16 @@ void CheckUnusedVar::checkStructMemberUsage()
         if (Token::findmatch(scope->classEnd, castPattern.c_str()))
             continue;
 
+        // Bail out if struct is used in sizeof..
+        for (const Token *tok = scope->classEnd; nullptr != (tok = Token::findsimplematch(tok, "sizeof ("));) {
+            if (Token::Match(tok->tokAt(2), ("struct| " + scope->className).c_str())) {
+                bailout = true;
+                break;
+            }
+        }
+        if (bailout)
+            continue;
+
         // Try to prevent false positives when struct members are not used directly.
         if (Token::findmatch(scope->classEnd, (scope->className + " %type%| *").c_str()))
             continue;
diff --git a/test/testunusedvar.cpp b/test/testunusedvar.cpp
index a4aa7255e..8c08c8c84 100644
--- a/test/testunusedvar.cpp
+++ b/test/testunusedvar.cpp
@@ -48,6 +48,7 @@ private:
         TEST_CASE(structmember10);
         TEST_CASE(structmember11); // #4168 - initialization with {} / passed by address to unknown function
         TEST_CASE(structmember12); // #7179 - FP unused structmember
+        TEST_CASE(structmember_sizeof);
 
         TEST_CASE(localvar1);
         TEST_CASE(localvar2);
@@ -461,6 +462,22 @@ private:
         ASSERT_EQUALS("[test.cpp:3]: (style) struct member 'AB::a' is never used.\n", errout.str());
     }
 
+    void structmember_sizeof() {
+        checkStructMemberUsage("struct Header {\n"
+                               "  uint8_t message_type;\n"
+                               "}\n"
+                               "\n"
+                               "input.skip(sizeof(Header));");
+        ASSERT_EQUALS("", errout.str());
+
+        checkStructMemberUsage("struct Header {\n"
+                               "  uint8_t message_type;\n"
+                               "}\n"
+                               "\n"
+                               "input.skip(sizeof(struct Header));");
+        ASSERT_EQUALS("", errout.str());
+    }
+
     void functionVariableUsage(const char code[], const char filename[]="test.cpp") {
         // Clear the error buffer..
         errout.str("");