diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index c54bc1ef688..51991f1f9e7 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -6225,6 +6225,28 @@ void Tokenizer::simplifyHeadersAndUnusedTemplates()
     for (Token *tok = list.front(); tok; tok = tok->next()) {
         const bool isIncluded = (tok->fileIndex() != 0);
 
+        // Remove constructor initializer
+        if (isIncluded && !mSettings.checkHeaders && Token::Match(tok, "%name% (")) {
+            Token *start = tok->next()->link();
+            if (start) {
+                start = start->next();
+            }
+            if (start && start->str() == ":") {
+                const Token *next = start;
+                while (Token::Match(next, "[,:] %name%")) {
+                    next = next->next(); // Go to %name%
+                    next = next->next(); // Go to opening '(' or '{'
+                    if (next && next->link()) {
+                        next = next->link(); // Go to closing ')' or '}'
+                        next = next->next(); // Go to next, either ',' or '{'
+                    }
+                }
+                if (next && next->str() == "{") {
+                    Token::eraseTokens(start->previous(), next);
+                }
+            }
+        }
+
         // Remove executable code
         if (isIncluded && !mSettings.checkHeaders && tok->str() == "{") {
             // TODO: We probably need to keep the executable code if this function is called from the source file.
diff --git a/test/testtokenize.cpp b/test/testtokenize.cpp
index b07114d7f79..4d1415a30b8 100644
--- a/test/testtokenize.cpp
+++ b/test/testtokenize.cpp
@@ -433,6 +433,8 @@ class TestTokenizer : public TestFixture {
         TEST_CASE(cppcast);
 
         TEST_CASE(checkHeader1);
+        TEST_CASE(checkHeader2);
+        TEST_CASE(checkHeader3);
 
         TEST_CASE(removeExtraTemplateKeywords);
 
@@ -7750,6 +7752,52 @@ class TestTokenizer : public TestFixture {
                       checkHdrs(code, false));
     }
 
+    void checkHeader2() {
+        // #9977
+        const char code[] = "# 1 \"test.h\"\n"
+                            "A::A(const int &value)\n"
+                            "    :data(value),\n"
+                            "     data2(value)\n"
+                            "    {}\n";
+
+        ASSERT_EQUALS("\n\n##file 1\n"
+                      "1: A :: A ( const int & value )\n"
+                      "2: : data ( value ) ,\n"
+                      "3: data2 ( value )\n"
+                      "4: { }\n",
+                      checkHdrs(code, true));
+
+        ASSERT_EQUALS("\n\n##file 1\n"
+                      "1: A :: A ( const int & value )\n"
+                      "2:\n"
+                      "3:\n"
+                      "4: ;\n",
+                      checkHdrs(code, false));
+    }
+
+    void checkHeader3() {
+        // #9977
+        const char code[] = "# 1 \"test.h\"\n"
+                            "A::A(const int &value)\n"
+                            "    :data{value},\n"
+                            "     data2{value}\n"
+                            "    {}\n";
+
+        ASSERT_EQUALS("\n\n##file 1\n"
+                      "1: A :: A ( const int & value )\n"
+                      "2: : data { value } ,\n"
+                      "3: data2 { value }\n"
+                      "4: { }\n",
+                      checkHdrs(code, true));
+
+        ASSERT_EQUALS("\n\n##file 1\n"
+                      "1: A :: A ( const int & value )\n"
+                      "2:\n"
+                      "3:\n"
+                      "4: ;\n",
+                      checkHdrs(code, false));
+    }
+
     void removeExtraTemplateKeywords() {
         const char code1[] = "typename GridView::template Codim<0>::Iterator iterator;";
         const char expected1[] = "GridView :: Codim < 0 > :: Iterator iterator ;";