diff --git a/fsw/shared/src/cfe_psp_module.c b/fsw/shared/src/cfe_psp_module.c
index 0121b143..88d9ddf3 100644
--- a/fsw/shared/src/cfe_psp_module.c
+++ b/fsw/shared/src/cfe_psp_module.c
@@ -52,6 +52,7 @@
 #define CFE_PSP_INTERNAL_MODULE_BASE ((CFE_PSP_MODULE_BASE | CFE_PSP_MODULE_INDEX_MASK) & ~0xFF)
 
 static uint32 CFE_PSP_ConfigPspModuleListLength = 0;
+static uint32 CFE_PSP_StandardPspModuleListLength = 0;
 
 /***************************************************
  *
@@ -96,10 +97,9 @@ uint32_t CFE_PSP_ModuleInitList(uint32 BaseId, CFE_StaticModuleLoadEntry_t *List
 void CFE_PSP_ModuleInit(void)
 {
     /* First initialize the fixed set of modules for this PSP */
-    CFE_PSP_ModuleInitList(CFE_PSP_INTERNAL_MODULE_BASE, CFE_PSP_BASE_MODULE_LIST);
+    CFE_PSP_StandardPspModuleListLength = CFE_PSP_ModuleInitList(CFE_PSP_INTERNAL_MODULE_BASE, CFE_PSP_BASE_MODULE_LIST);
 
     /* Then initialize any user-selected extension modules */
-    /* Only these modules can be used with CFE_PSP_Module_GetAPIEntry or CFE_PSP_Module_FindByName */
     CFE_PSP_ConfigPspModuleListLength = CFE_PSP_ModuleInitList(CFE_PSP_MODULE_BASE, GLOBAL_CONFIGDATA.PspModuleList);
 }
 
@@ -113,15 +113,32 @@ int32 CFE_PSP_Module_GetAPIEntry(uint32 PspModuleId, CFE_PSP_ModuleApi_t **API)
     uint32 LocalId;
 
     Result = CFE_PSP_INVALID_MODULE_ID;
-    if ((PspModuleId & ~CFE_PSP_MODULE_INDEX_MASK) == CFE_PSP_MODULE_BASE)
+
+    /* Last 256 enteries are for internal modules */
+    if((PspModuleId & CFE_PSP_MODULE_INDEX_MASK) >= 0xFF00 )
     {
-        LocalId = PspModuleId & CFE_PSP_MODULE_INDEX_MASK;
-        if (LocalId < CFE_PSP_ConfigPspModuleListLength)
+        if ((PspModuleId & ~CFE_PSP_MODULE_INDEX_MASK) == CFE_PSP_MODULE_BASE)
         {
-            *API   = (CFE_PSP_ModuleApi_t *)GLOBAL_CONFIGDATA.PspModuleList[LocalId].Api;
-            Result = CFE_PSP_SUCCESS;
+            LocalId = PspModuleId & 0xFF;
+            if (LocalId < CFE_PSP_StandardPspModuleListLength)
+            {
+                *API   = (CFE_PSP_ModuleApi_t *)CFE_PSP_BASE_MODULE_LIST[LocalId].Api;
+                Result = CFE_PSP_SUCCESS;
+            }
         }
     }
+    else
+    {
+        if ((PspModuleId & ~CFE_PSP_MODULE_INDEX_MASK) == CFE_PSP_MODULE_BASE)
+        {
+            LocalId = PspModuleId & CFE_PSP_MODULE_INDEX_MASK;
+            if (LocalId < CFE_PSP_ConfigPspModuleListLength)
+            {
+                *API   = (CFE_PSP_ModuleApi_t *)GLOBAL_CONFIGDATA.PspModuleList[LocalId].Api;
+                Result = CFE_PSP_SUCCESS;
+            }
+        }  
+    }
 
     return Result;
 }
@@ -139,6 +156,8 @@ int32 CFE_PSP_Module_FindByName(const char *ModuleName, uint32 *PspModuleId)
     Entry  = GLOBAL_CONFIGDATA.PspModuleList;
     Result = CFE_PSP_INVALID_MODULE_NAME;
     i      = 0;
+
+    /* Check global list */
     while (i < CFE_PSP_ConfigPspModuleListLength)
     {
         if (strcmp(Entry->Name, ModuleName) == 0)
@@ -151,5 +170,23 @@ int32 CFE_PSP_Module_FindByName(const char *ModuleName, uint32 *PspModuleId)
         ++i;
     }
 
+    /* Check internal list */
+    if (Result != CFE_PSP_SUCCESS)
+    {
+        Entry = CFE_PSP_BASE_MODULE_LIST;
+        i     = 0;
+        while (i < CFE_PSP_StandardPspModuleListLength)
+        {
+            if (strcmp(Entry->Name, ModuleName) == 0)
+            {
+                *PspModuleId = CFE_PSP_INTERNAL_MODULE_BASE | (i & CFE_PSP_MODULE_INDEX_MASK);
+                Result       = CFE_PSP_SUCCESS;
+                break;
+            }
+            ++Entry;
+            ++i;
+        }
+    }
+
     return Result;
 }