1 files changed, 14 insertions, 0 deletions
diff --git a/src/nvim/charset.h b/src/nvim/charset.h
index 78d6f2a76c..c69582c4c6 100644
--- a/src/nvim/charset.h
+++ b/src/nvim/charset.h
@@ -1,6 +1,20 @@
 #ifndef NVIM_CHARSET_H
 #define NVIM_CHARSET_H
 
+#include "nvim/types.h"
+#include "nvim/pos.h"
+#include "nvim/buffer_defs.h"
+
+/// Return the folded-case equivalent of the given character
+///
+/// @param[in]  c  Character to transform.
+///
+/// @return Folded variant.
+#define CH_FOLD(c) \
+    utf_fold((sizeof(c) == sizeof(char)) \
+             ?((int)(uint8_t)(c)) \
+             :((int)(c)))
+
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "charset.h.generated.h"
 #endif