diff --git a/source/compiler/sc1.c b/source/compiler/sc1.c
index 09d25df..616da3c 100644
--- a/source/compiler/sc1.c
+++ b/source/compiler/sc1.c
@@ -4971,6 +4971,14 @@ static void destructsymbols(symbol *root,int level)
       /* check that the '~' operator is defined for this tag */
       operator_symname(symbolname,"~",sym->tag,0,1,0);
       if ((opsym=findglb(symbolname,sGLOBAL))!=NULL) {
+        if ((opsym->usage & uMISSING)!=0 || (opsym->usage & uPROTOTYPED)==0) {
+          char symname[2*sNAMEMAX+16];  /* allow space for user defined operators */
+          funcdisplayname(symname,opsym->name);
+          if ((opsym->usage & uMISSING)!=0)
+            error(4,symname);           /* function not defined */
+          if ((opsym->usage & uPROTOTYPED)==0)
+            error(71,symname);          /* operator must be declared before use */
+        } /* if */
         /* save PRI, in case of a return statment */
         if (!savepri) {
           pushreg(sPRI);        /* right-hand operand is in PRI */
diff --git a/source/compiler/tests/CMakeLists.txt b/source/compiler/tests/CMakeLists.txt
index b1538ce..02110b4 100644
--- a/source/compiler/tests/CMakeLists.txt
+++ b/source/compiler/tests/CMakeLists.txt
@@ -80,6 +80,12 @@ set_tests_properties(md_array_size_chk_gh_314 PROPERTIES PASS_REGULAR_EXPRESSION
 ")
 set_tests_properties(md_array_size_chk_gh_314 PROPERTIES WILL_FAIL TRUE)
 
+add_compiler_test(destructor_not_impl_gh_310 ${CMAKE_CURRENT_SOURCE_DIR}/destructor_not_impl_gh_310.pwn)
+set_tests_properties(destructor_not_impl_gh_310 PROPERTIES PASS_REGULAR_EXPRESSION
+".*\\.pwn\\(6\\) : error 004: function \"operator~(Error:)\" is not implemented
+")
+set_tests_properties(destructor_not_impl_gh_310 PROPERTIES WILL_FAIL TRUE)
+
 # Crashers
 #
 # These tests simply check that the compiler doesn't crash.
diff --git a/source/compiler/tests/destructor_not_impl_gh_310.pwn b/source/compiler/tests/destructor_not_impl_gh_310.pwn
new file mode 100644
index 0000000..7855e78
--- /dev/null
+++ b/source/compiler/tests/destructor_not_impl_gh_310.pwn
@@ -0,0 +1,4 @@
+forward operator~(Error:right[], size);
+main() {
+    new Error:e;
+}