diff --git a/lib/checkunusedvar.cpp b/lib/checkunusedvar.cpp
index e470bbae1..96698f076 100644
--- a/lib/checkunusedvar.cpp
+++ b/lib/checkunusedvar.cpp
@@ -1147,6 +1147,16 @@ void CheckUnusedVar::checkFunctionVariableUsage_iterateScopes(const Scope* const
             variables.use(tok->varId(), tok);   // use = read + write
         }
 
+        else if (Token::Match(tok, "[?:]")) {
+            // TODO: This is to avoid FP for 'p = c ? buf1 : buf2;'.
+            // Check if the address is taken. If not this is just a read.
+            // maybe handle struct members better
+            if (tok->astOperand1())
+                variables.use(tok->astOperand1()->varId(), tok->astOperand1());
+            if (tok->astOperand2())
+                variables.use(tok->astOperand2()->varId(), tok->astOperand2());
+        }
+
         else if (tok->isExtendedOp() && tok->next() && tok->next()->varId() && tok->strAt(2) != "=") {
             variables.readAll(tok->next()->varId(), tok);
         }
diff --git a/test/testunusedvar.cpp b/test/testunusedvar.cpp
index 715005863..bc2f2995e 100644
--- a/test/testunusedvar.cpp
+++ b/test/testunusedvar.cpp
@@ -2019,7 +2019,8 @@ private:
         ASSERT_EQUALS("[test.cpp:16]: (style) Variable 'x' is assigned a value that is never used.\n", errout.str());
     }
 
-    void localvar50() { // #6261
+    void localvar50() { // #6261, #6542
+        // #6261 - ternary operator in function call
         functionVariableUsage("void foo() {\n"
                               "  char buf1[10];\n"
                               "  dostuff(cond?buf1:buf2);\n"
@@ -2031,6 +2032,14 @@ private:
                               "  dostuff(cond?buf2:buf1);\n"
                               "}");
         ASSERT_EQUALS("", errout.str());
+
+        // #6542 - ternary operator
+        functionVariableUsage("void foo(int c) {\n"
+                              "  char buf1[10], buf2[10];\n"
+                              "  char *p = c ? buf1 : buf2;\n"
+                              "  dostuff(p);\n"
+                              "}");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void localvaralias1() {