diff --git a/lib/symboldatabase.cpp b/lib/symboldatabase.cpp
index d1ac96f2b..6e508b399 100644
--- a/lib/symboldatabase.cpp
+++ b/lib/symboldatabase.cpp
@@ -742,6 +742,11 @@ SymbolDatabase::SymbolDatabase(const Tokenizer *tokenizer, const Settings *setti
         for (std::list<Scope>::iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
             scope = &(*it);
 
+            if (!scope->definedType) {
+                _blankTypes.push_back(Type());
+                scope->definedType = &_blankTypes.back();
+            }
+
             if (scope->isClassOrStruct() && scope->definedType->needInitialization == Type::Unknown) {
                 // check for default constructor
                 bool hasDefaultConstructor = false;
@@ -799,7 +804,7 @@ SymbolDatabase::SymbolDatabase(const Tokenizer *tokenizer, const Settings *setti
                     if (scope->definedType->needInitialization == Type::Unknown)
                         unknowns++;
                 }
-            } else if (scope->type == Scope::eUnion && scope->definedType && scope->definedType->needInitialization == Type::Unknown)
+            } else if (scope->type == Scope::eUnion && scope->definedType->needInitialization == Type::Unknown)
                 scope->definedType->needInitialization = Type::True;
         }
 
diff --git a/lib/symboldatabase.h b/lib/symboldatabase.h
index 0d7ed461f..03b7ad090 100644
--- a/lib/symboldatabase.h
+++ b/lib/symboldatabase.h
@@ -730,6 +730,9 @@ private:
 
     /** variable symbol table */
     std::vector<const Variable *> _variableList;
+
+    /** list for missing types */
+    std::list<Type> _blankTypes;
 };
 
 #endif
diff --git a/test/testsymboldatabase.cpp b/test/testsymboldatabase.cpp
index 321bcf3b2..a8ea3ab3a 100644
--- a/test/testsymboldatabase.cpp
+++ b/test/testsymboldatabase.cpp
@@ -193,6 +193,7 @@ private:
         TEST_CASE(symboldatabase33); // ticket #4682 (false negatives)
         TEST_CASE(symboldatabase34); // ticket #4694 (segmentation fault)
         TEST_CASE(symboldatabase35); // ticket #4806 (segmentation fault)
+        TEST_CASE(symboldatabase36); // ticket #4892 (segmentation fault)
 
         TEST_CASE(isImplicitlyVirtual);
 
@@ -1513,6 +1514,11 @@ private:
         ASSERT_EQUALS("", errout.str());
     }
 
+    void symboldatabase36() { // ticket #4892
+        check("void struct ( ) { if ( 1 ) } int main ( ) { }");
+        ASSERT_EQUALS("", errout.str());
+    }
+
     void isImplicitlyVirtual() {
         {
             GET_SYMBOL_DB("class Base {\n"