diff --git a/bitstream.h b/bitstream.h
index c25643a..00509a7 100644
--- a/bitstream.h
+++ b/bitstream.h
@@ -11,7 +11,6 @@
 #include <stdint.h>
 
 #include "internals.h"
-#include "error.h"
 #include "mem.h"
 
 struct bswriter {
diff --git a/decode_generic.h b/decode_generic.h
index dc91e92..ec15a22 100644
--- a/decode_generic.h
+++ b/decode_generic.h
@@ -8,7 +8,6 @@
 
 #include "bitstream.h"
 #include "common.h"
-#include "error.h"
 #include "internals.h"
 
 #define decctx_(_width_) BITWIDTH_SUFFIX(decctx, _width_)
diff --git a/encode_generic.h b/encode_generic.h
index b3556cc..c0d630c 100644
--- a/encode_generic.h
+++ b/encode_generic.h
@@ -9,7 +9,6 @@
 #include "bitstream.h"
 #include "common.h"
 #include "countbits.h"
-#include "error.h"
 #include "internals.h"
 
 #define encctx_(_width_) BITWIDTH_SUFFIX(encctx, _width_)
diff --git a/error.h b/error.h
deleted file mode 100644
index 375df88..0000000
--- a/error.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/**
-  Copyright (c) 2019 Vicente Romero Calero. All rights reserved.
-  Licensed under the MIT License.
-  See LICENSE file in the project root for full license information.
- */
-#ifndef VTENC_ERROR_H_
-#define VTENC_ERROR_H_
-
-#include "internals.h"
-
-#define return_if_error(exp)  \
-do {                          \
-  const int code = (exp);     \
-  if (code != VTENC_OK) {     \
-    return code;              \
-  }                           \
-} while(0)
-
-#endif /* VTENC_ERROR_H_ */
diff --git a/internals.h b/internals.h
index 977367a..9a20c22 100644
--- a/internals.h
+++ b/internals.h
@@ -40,4 +40,13 @@ struct vtenc {
   size_t out_size;              /* Output size in bytes */
 };
 
+/* Error-handling helper macro */
+#define return_if_error(exp)  \
+do {                          \
+  const int code = (exp);     \
+  if (code != VTENC_OK) {     \
+    return code;              \
+  }                           \
+} while(0)
+
 #endif /* VTENC_INTERNALS_H_ */