diff --git a/backend/codablock.c b/backend/codablock.c
new file mode 100644
index 00000000..8b9fd77f
--- /dev/null
+++ b/backend/codablock.c
@@ -0,0 +1,45 @@
+/* codablock.c - Handles Codablock-F and Codablock-E */
+
+/*
+    libzint - the open source barcode library
+    Copyright (C) 2016 Harald Oehlmann
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    1. Redistributions of source code must retain the above copyright 
+       notice, this list of conditions and the following disclaimer.  
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.  
+    3. Neither the name of the project nor the names of its contributors
+       may be used to endorse or promote products derived from this software
+       without specific prior written permission. 
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+    ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+    SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include "common.h"
+
+int codablock(struct zint_symbol *symbol, unsigned char source[], int length) {
+    
+    if  (symbol->input_mode == GS1_MODE) {
+        printf("Encode GS1 data (Codablock-E?)\n");
+    } else {
+        printf("Encode in Codablock-F\n");
+    }
+    
+    return ZINT_ERROR_INVALID_OPTION;
+}
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