diff --git a/lsteamclient/cppISteamNetworkingUtils_SteamNetworkingUtils001.cpp b/lsteamclient/cppISteamNetworkingUtils_SteamNetworkingUtils001.cpp
index db454164..42161893 100644
--- a/lsteamclient/cppISteamNetworkingUtils_SteamNetworkingUtils001.cpp
+++ b/lsteamclient/cppISteamNetworkingUtils_SteamNetworkingUtils001.cpp
@@ -71,6 +71,7 @@ SteamNetworkingMicroseconds cppISteamNetworkingUtils_SteamNetworkingUtils001_Get
 
 void cppISteamNetworkingUtils_SteamNetworkingUtils001_SetDebugOutputFunction(void *linux_side, ESteamNetworkingSocketsDebugOutputType eDetailLevel, FSteamNetworkingSocketsDebugOutput pfnFunc)
 {
+    pfnFunc = (FSteamNetworkingSocketsDebugOutput)manual_convert_FSteamNetworkingSocketsDebugOutput((void*)pfnFunc);
     ((ISteamNetworkingUtils*)linux_side)->SetDebugOutputFunction((ESteamNetworkingSocketsDebugOutputType)eDetailLevel, (FSteamNetworkingSocketsDebugOutput)pfnFunc);
 }
 
diff --git a/lsteamclient/gen_wrapper.py b/lsteamclient/gen_wrapper.py
index a6551049..ecafd9eb 100755
--- a/lsteamclient/gen_wrapper.py
+++ b/lsteamclient/gen_wrapper.py
@@ -169,6 +169,11 @@ manually_handled_structs = [
         "SteamNetworkingMessage_t"
 ]
 
+# manual converters for simple types (function pointers)
+manual_type_converters = [
+        "FSteamNetworkingSocketsDebugOutput"
+]
+
 #struct_conversion_cache = {
 #    '142': {
 #                'SteamUGCDetails_t': True,
@@ -467,6 +472,7 @@ def handle_method(cfile, classname, winclassname, cppname, method, cpp, cpp_h, e
         cfile.write(", %s *_r" % method.result_type.spelling)
     unnamed = 'a'
     need_convert = []
+    manual_convert = []
     for param in list(method.get_children()):
         if param.kind == clang.cindex.CursorKind.PARM_DECL:
             if param.type.kind == clang.cindex.TypeKind.POINTER and \
@@ -486,6 +492,8 @@ def handle_method(cfile, classname, winclassname, cppname, method, cpp, cpp_h, e
                 need_convert.append(param)
                 #preserve pointers
                 win_name = typename.replace(real_type.spelling, "win%s_%s" % (real_type.spelling, sdkver))
+            elif real_type.spelling in manual_type_converters:
+                manual_convert.append(param)
 
             if param.spelling == "":
                 cfile.write(", %s _%s" % (win_name, unnamed))
@@ -532,6 +540,8 @@ def handle_method(cfile, classname, winclassname, cppname, method, cpp, cpp_h, e
             #raw structs
             cpp.write("    %s lin_%s;\n" % (param.type.spelling, param.spelling))
             cpp.write("    win_to_lin_struct_%s_%s(&%s, &lin_%s);\n" % (param.type.spelling, sdkver, param.spelling, param.spelling))
+    for param in manual_convert:
+        cpp.write("    %s = (%s)manual_convert_%s((void*)%s);\n" % (param.spelling, param.type.spelling, param.type.spelling, param.spelling))
 
     cfile.write("    TRACE(\"%p\\n\", _this);\n")
 
diff --git a/lsteamclient/steam_defs.h b/lsteamclient/steam_defs.h
index 05d96a2f..f9bcc12a 100644
--- a/lsteamclient/steam_defs.h
+++ b/lsteamclient/steam_defs.h
@@ -209,7 +209,8 @@ typedef struct SteamDatagramHostedAddress SteamDatagramHostedAddress;
 typedef void *SteamAPI_CheckCallbackRegistered_t;
 typedef void *SteamAPIWarningMessageHook_t;
 typedef void *SteamAPI_PostAPIResultInProcess_t;
-typedef void *FSteamNetworkingSocketsDebugOutput; /* XXX */
+
+typedef void (*FSteamNetworkingSocketsDebugOutput)(ESteamNetworkingSocketsDebugOutputType nType, const char *pszMsg);
 
 typedef uint8 Salt_t[8];
 typedef uint64 GID_t;
diff --git a/lsteamclient/steamclient_private.h b/lsteamclient/steamclient_private.h
index c92f5a27..ac1101b6 100644
--- a/lsteamclient/steamclient_private.h
+++ b/lsteamclient/steamclient_private.h
@@ -46,6 +46,7 @@ void *create_LinuxISteamMatchmakingServerListResponse(void *win, const char *ver
 void *create_LinuxISteamMatchmakingPingResponse(void *win, const char *version);
 void *create_LinuxISteamMatchmakingPlayersResponse(void *win, const char *version);
 void *create_LinuxISteamMatchmakingRulesResponse(void *win, const char *version);
+void *manual_convert_FSteamNetworkingSocketsDebugOutput(void *win_func);
 
 extern char g_tmppath[PATH_MAX];
 
diff --git a/lsteamclient/steamclient_wrappers.c b/lsteamclient/steamclient_wrappers.c
index adede0b2..34c463b5 100644
--- a/lsteamclient/steamclient_wrappers.c
+++ b/lsteamclient/steamclient_wrappers.c
@@ -280,3 +280,18 @@ void *create_LinuxISteamMatchmakingRulesResponse(void *win, const char *version)
 
     return ret;
 }
+
+
+/***** FSteamNetworkingSocketsDebugOutput *****/
+static void (CDECL *stored_FSteamNetworkingSocketsDebugOutput)(ESteamNetworkingSocketsDebugOutputType nType, const char *pszMsg);
+
+static void lin_FSteamNetworkingSocketsDebugOutput(ESteamNetworkingSocketsDebugOutputType nType, const char *pszMsg)
+{
+    stored_FSteamNetworkingSocketsDebugOutput(nType, pszMsg);
+}
+
+void *manual_convert_FSteamNetworkingSocketsDebugOutput(void *win_func)
+{
+    stored_FSteamNetworkingSocketsDebugOutput = (void*)win_func;
+    return &lin_FSteamNetworkingSocketsDebugOutput;
+}