diff --git a/modules/fs/fsw/src/cfe_fs_api.c b/modules/fs/fsw/src/cfe_fs_api.c
index 40812f7b2..47e19a19c 100644
--- a/modules/fs/fsw/src/cfe_fs_api.c
+++ b/modules/fs/fsw/src/cfe_fs_api.c
@@ -138,6 +138,12 @@ CFE_Status_t CFE_FS_ReadHeader(CFE_FS_Header_t *Hdr, osal_id_t FileDes)
         */
         OsStatus = OS_read(FileDes, Hdr, sizeof(CFE_FS_Header_t));
 
+        /* Check if the read was successful */
+        if (OsStatus != sizeof(CFE_FS_Header_t)) 
+        {
+            return CFE_STATUS_EXTERNAL_RESOURCE_FAIL;
+        }
+
         /* Determine if this processor is a little endian processor */
         /* cppcheck-suppress knownConditionTrueFalse */
         if ((*(char *)(&EndianCheck)) == 0x04)
diff --git a/modules/fs/ut-coverage/fs_UT.c b/modules/fs/ut-coverage/fs_UT.c
index 36ace51e8..75147816d 100644
--- a/modules/fs/ut-coverage/fs_UT.c
+++ b/modules/fs/ut-coverage/fs_UT.c
@@ -122,6 +122,11 @@ void Test_CFE_FS_ReadHeader(void)
     UT_SetDefaultReturnValue(UT_KEY(OS_read), OS_ERROR);
     UtAssert_INT32_EQ(CFE_FS_ReadHeader(&Hdr, FileDes), CFE_STATUS_EXTERNAL_RESOURCE_FAIL);
 
+    /* Test partial success with reading header */
+    UT_InitData();
+    UT_SetDefaultReturnValue(UT_KEY(OS_read), 1);
+    UtAssert_INT32_EQ(CFE_FS_ReadHeader(&Hdr, FileDes), CFE_STATUS_EXTERNAL_RESOURCE_FAIL);
+
     /* Test successfully reading the header */
     UT_InitData();
     UtAssert_INT32_EQ(CFE_FS_ReadHeader(&Hdr, FileDes), sizeof(Hdr));