diff --git a/cmdopt.cpp b/cmdopt.cpp
index 4ead8eda..e2aab6a2 100644
--- a/cmdopt.cpp
+++ b/cmdopt.cpp
@@ -18,7 +18,6 @@
 
 #include "debug.hpp"
 
-#include <algorithm>
 #include <cstring>
 #include <iostream>
 #include <iomanip>
@@ -154,48 +153,6 @@ present::finish (void)
 }
 
 
-///////////////////////////////////////////////////////////////////////////////
-namespace util { namespace cmdopt { namespace option {
-    template <>
-    void
-    value<bool>::execute (const char *restrict str)
-    {
-        static const std::string TRUE_STRING[] = {
-            "true",
-            "yes",
-            "y",
-            "1"
-        };
-
-        if (std::any_of (std::begin (TRUE_STRING),
-                         std::end (TRUE_STRING),
-                         [str] (auto i) { return i == str; }))
-        {
-            m_data = true;
-            return;
-        }
-
-        static const std::string FALSE_STRING[] = {
-            "false",
-            "no",
-            "n",
-            "0"
-        };
-
-        if (std::any_of (std::begin (FALSE_STRING),
-                         std::end (FALSE_STRING),
-                         [str] (auto i) { return i == str; }))
-        {
-            m_data = false;
-            return;
-        }
-
-        base::execute (str);
-        seen (true);
-    }
-} } }
-
-
 //-----------------------------------------------------------------------------
 namespace util { namespace cmdopt { namespace option {
     template class value<uint16_t>;
diff --git a/cmdopt.ipp b/cmdopt.ipp
index c77711ee..f4c3f878 100644
--- a/cmdopt.ipp
+++ b/cmdopt.ipp
@@ -20,6 +20,7 @@
 #define __UTIL_CMDLINE_IPP
 
 #include <sstream>
+#include <algorithm>
 
 #include "./introspection.hpp"
 #include "./iterator.hpp"
@@ -34,7 +35,7 @@ namespace util { namespace cmdopt {
 
     //-------------------------------------------------------------------------
     template <typename T>
-    void
+    inline void
     option::value<T>::execute (const char *restrict str)
     {
         try {
@@ -53,6 +54,48 @@ namespace util { namespace cmdopt {
     }
 
 
+    //-------------------------------------------------------------------------
+    namespace option {
+    template <>
+    inline void
+    value<bool>::execute (const char *restrict str)
+    {
+        static const std::string TRUE_STRING[] = {
+            "true",
+            "yes",
+            "y",
+            "1"
+        };
+
+        if (std::any_of (std::begin (TRUE_STRING),
+                         std::end (TRUE_STRING),
+                         [str] (auto i) { return i == str; }))
+        {
+            m_data = true;
+            return;
+        }
+
+        static const std::string FALSE_STRING[] = {
+            "false",
+            "no",
+            "n",
+            "0"
+        };
+
+        if (std::any_of (std::begin (FALSE_STRING),
+                         std::end (FALSE_STRING),
+                         [str] (auto i) { return i == str; }))
+        {
+            m_data = false;
+            return;
+        }
+
+        base::execute (str);
+        seen (true);
+    }
+    }
+
+
     //-------------------------------------------------------------------------
     namespace detail {
         template <typename T>