diff --git a/lib/checkcondition.cpp b/lib/checkcondition.cpp
index d58d877ca..396cbf3a0 100644
--- a/lib/checkcondition.cpp
+++ b/lib/checkcondition.cpp
@@ -383,9 +383,9 @@ bool CheckCondition::isOppositeCond(bool isNot, const Token * const cond1, const
 
     if (cond1->str() == "!") {
         if (cond2->str() == "!=") {
-            if (cond2->astOperand1()->str() == "0")
+            if (cond2->astOperand1() && cond2->astOperand1()->str() == "0")
                 return isSameExpression(_tokenizer, cond1->astOperand1(), cond2->astOperand2(), constFunctions);
-            if (cond2->astOperand2()->str() == "0")
+            if (cond2->astOperand2() && cond2->astOperand2()->str() == "0")
                 return isSameExpression(_tokenizer, cond1->astOperand1(), cond2->astOperand1(), constFunctions);
         }
         return isSameExpression(_tokenizer, cond1->astOperand1(), cond2, constFunctions);
diff --git a/test/testgarbage.cpp b/test/testgarbage.cpp
index 7e39655eb..54dd129a7 100644
--- a/test/testgarbage.cpp
+++ b/test/testgarbage.cpp
@@ -147,6 +147,7 @@ private:
         TEST_CASE(garbageCode105); // #6859
         TEST_CASE(garbageCode106);
         TEST_CASE(garbageCode107);
+        TEST_CASE(garbageCode108);
 
         TEST_CASE(garbageValueFlow);
         TEST_CASE(garbageSymbolDatabase);
@@ -829,6 +830,10 @@ private:
         ASSERT_THROW(checkCode("enum { val = 1{ }; { const} }; { } Bar { const int A = val const } ;"), InternalError);
     }
 
+    void garbageCode108() { //  #6895 "segmentation fault (invalid code) in CheckCondition::isOppositeCond"
+        checkCode("A( ) { } bool f( ) { ( ) F; ( ) { ( == ) if ( !=< || ( !A( ) && r[2] ) ) ( !A( ) ) ( ) } }");
+    }
+
 
     void garbageValueFlow() {
         // #6089