diff --git a/.Rbuildignore b/.Rbuildignore
index 6538a172..e8a6c1c9 100644
--- a/.Rbuildignore
+++ b/.Rbuildignore
@@ -8,3 +8,5 @@
 ^docs$
 ^pkgdown$
 ^codecov\.yml$
+^compile_commands\.json$
+^\.cache$
diff --git a/.gitignore b/.gitignore
index 138866d2..287eb1eb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,5 @@
 .Ruserdata
 inst/doc
 docs
+compile_commands.json
+.cache
diff --git a/DESCRIPTION b/DESCRIPTION
index d388a37a..e72686aa 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -48,3 +48,4 @@ Suggests:
 VignetteBuilder: knitr
 RoxygenNote: 7.3.2
 Config/testthat/edition: 3
+Config/build/compilation-database: true
diff --git a/src/shikokuchuo.c b/src/shikokuchuo.c
index fd109832..17c652c9 100644
--- a/src/shikokuchuo.c
+++ b/src/shikokuchuo.c
@@ -16,8 +16,12 @@
 
 // ichimoku - Functions Utilising R's C API ------------------------------------
 
+#ifndef R_NO_REMAP
 #define R_NO_REMAP
+#endif
+#ifndef STRICT_R_HEADERS
 #define STRICT_R_HEADERS
+#endif
 #include <R.h>
 #include <Rinternals.h>
 #include <R_ext/Visibility.h>