diff --git a/src/Generator/Passes/GenerateSymbolsPass.cs b/src/Generator/Passes/GenerateSymbolsPass.cs
index b19f2ef5..1f8abdcb 100644
--- a/src/Generator/Passes/GenerateSymbolsPass.cs
+++ b/src/Generator/Passes/GenerateSymbolsPass.cs
@@ -193,7 +193,12 @@ namespace CppSharp.Passes
                 specs = specializations[specialization.TranslationUnit.Module];
             else specs = specializations[specialization.TranslationUnit.Module] =
                 new HashSet<ClassTemplateSpecialization>();
-            specs.Add(specialization);
+            if (!specs.Contains(specialization))
+            {
+                specs.Add(specialization);
+                foreach (Method method in specialization.Methods)
+                    method.Visit(this);
+            }
             GetSymbolsCodeGenerator(specialization.TranslationUnit.Module);
         }