diff --git a/include/erasurecode/erasurecode_postprocessing.h b/include/erasurecode/erasurecode_postprocessing.h
index 395700d..7585b04 100644
--- a/include/erasurecode/erasurecode_postprocessing.h
+++ b/include/erasurecode/erasurecode_postprocessing.h
@@ -29,6 +29,8 @@
 #ifndef _ERASURECODE_POSTPROCESSING_H_
 #define _ERASURECODE_POSTPROCESSING_H_
 
+#include "erasurecode_backend.h"
+
 int finalize_fragments_after_encode(ec_backend_t instance,
         int k, int m, int blocksize,  uint64_t orig_data_size,
         char **encoded_data, char **encoded_parity);
diff --git a/include/erasurecode/erasurecode_preprocessing.h b/include/erasurecode/erasurecode_preprocessing.h
index 7ca891d..73554eb 100644
--- a/include/erasurecode/erasurecode_preprocessing.h
+++ b/include/erasurecode/erasurecode_preprocessing.h
@@ -29,6 +29,8 @@
 #ifndef _ERASURECODE_PREPROCESSING_H_
 #define _ERASURECODE_PREPROCESSING_H_
 
+#include "erasurecode_backend.h"
+
 int prepare_fragments_for_encode(
         ec_backend_t instance,
         int k, int m,
diff --git a/include/isa_l/isa_l_common.h b/include/isa_l/isa_l_common.h
index 0445544..30f18e6 100644
--- a/include/isa_l/isa_l_common.h
+++ b/include/isa_l/isa_l_common.h
@@ -27,6 +27,8 @@
  * vi: set noai tw=79 ts=4 sw=4:
  */
 
+#include "erasurecode_backend.h"
+
 #define ISA_L_W 8
 
 /* Forward declarations */