diff --git a/cfg/std.cfg b/cfg/std.cfg
index 3d2aed7ce..007b2f879 100644
--- a/cfg/std.cfg
+++ b/cfg/std.cfg
@@ -45,16 +45,21 @@
        <arg nr="1"><not-null/><not-uninit/></arg>
        <arg nr="2"><not-null/><not-uninit/></arg>
   </function>
-  <function name="ftell"> 
-       <noreturn>false</noreturn> 
-       <leak-ignore/> 
+  <function name="ftell">
+       <noreturn>false</noreturn>
+       <leak-ignore/>
        <arg nr="1"><not-null/><not-uninit/></arg>
-  </function>  
-  <function name="puts"> 
-       <noreturn>false</noreturn> 
-       <leak-ignore/> 
+  </function> 
+  <function name="puts">
+       <noreturn>false</noreturn>
+       <leak-ignore/>
        <arg nr="1"><not-null/><not-uninit/></arg>
-  </function>  
+  </function>
+  <function name="putchar">
+       <noreturn>false</noreturn>
+       <leak-ignore/>
+       <arg nr="1"><not-null/><not-uninit/><not-bool/><valid>0-</valid></arg>
+  </function> 
   <function name="isalnum"> <noreturn>false</noreturn> <leak-ignore/>  <arg nr="1"><valid>0-255</valid></arg> </function>
   <function name="isalpha"> <noreturn>false</noreturn> <leak-ignore/>  <arg nr="1"><valid>0-255</valid></arg> </function>
   <function name="isblank"> <noreturn>false</noreturn> <leak-ignore/>  <arg nr="1"><valid>0-255</valid></arg> </function>
diff --git a/test/testnullpointer.cpp b/test/testnullpointer.cpp
index eec9fda93..1e1ecf532 100644
--- a/test/testnullpointer.cpp
+++ b/test/testnullpointer.cpp
@@ -2435,6 +2435,9 @@ private:
         check("void f(char * p){ strchr (p,c);if(!p){}}");
         ASSERT_EQUALS(errp,errout.str());
 
+        check("void f(char * p){ putchar (*p);if(!p){}}");
+        ASSERT_EQUALS(errp,errout.str());
+
         check("void f(char * p){ strdup (p);if(!p){}}");
         ASSERT_EQUALS(errp,errout.str());
 
diff --git a/test/testuninitvar.cpp b/test/testuninitvar.cpp
index 690064e1a..f9ddf60f7 100644
--- a/test/testuninitvar.cpp
+++ b/test/testuninitvar.cpp
@@ -3643,6 +3643,17 @@ private:
                        "}");
         ASSERT_EQUALS("", errout.str());
 
+        // putchar
+        checkUninitVar("void f() {\n"
+                       "  char *c;"
+                       "  putchar (*c);\n"
+                       "}");
+        ASSERT_EQUALS("[test.cpp:2]: (error) Uninitialized variable: c\n", errout.str());
+
+        checkUninitVar("void f( char *c) {\n"
+                       "  putchar (*c);\n"
+                       "}");
+        ASSERT_EQUALS("", errout.str());
     }
 };