diff --git a/project/headers.mk b/project/headers.mk
index 05d9d25..892cc91 100644
--- a/project/headers.mk
+++ b/project/headers.mk
@@ -11,4 +11,13 @@ INTERNAL_HEADERS = \
 	$(SOURCE_DIR)/src/internal/$(PACKAGE)_nolibc_impl.h \
 	$(SOURCE_DIR)/src/internal/$(PACKAGE)_strerr_impl.h \
 
-ALL_HEADERS = $(API_HEADERS) $(INTERNAL_HEADERS)
+NOLIBC_HEADERS = \
+	$(SOURCE_DIR)/src/internal/nolibc/stdbool.h \
+	$(SOURCE_DIR)/src/internal/nolibc/stddef.h \
+	$(SOURCE_DIR)/src/internal/nolibc/stdint.h \
+	$(SOURCE_DIR)/src/internal/nolibc/stdio.h \
+	$(SOURCE_DIR)/src/internal/nolibc/stdlib.h \
+	$(SOURCE_DIR)/src/internal/nolibc/string.h \
+	$(SOURCE_DIR)/src/internal/nolibc/unistd.h \
+
+ALL_HEADERS = $(API_HEADERS) $(INTERNAL_HEADERS) $(NOLIBC_HEADERS)