diff --git a/mustach-cjson.c b/mustach-cjson.c
index 33e3699..769a566 100644
--- a/mustach-cjson.c
+++ b/mustach-cjson.c
@@ -16,6 +16,8 @@ int mustach_process_cjson(const char *template, size_t length, const char *value
     return rc;
 }
 #else
+#include <mustach/mustach.h>
+
 int mustach_process_cjson(const char *template, size_t length, const char *value, size_t buffer_length, int flags, FILE *file, char **err) {
     *err = "!mustach_cjson";
     fclose(file);
diff --git a/mustach-jansson.c b/mustach-jansson.c
index 7a47586..c1d1bc0 100644
--- a/mustach-jansson.c
+++ b/mustach-jansson.c
@@ -19,6 +19,8 @@ int mustach_process_jansson(const char *template, size_t length, const char *buf
     return rc;
 }
 #else
+#include <mustach/mustach.h>
+
 int mustach_process_jansson(const char *template, size_t length, const char *buffer, size_t buflen, int flags, FILE *file, char **err) {
     *err = "!mustach_jansson";
     fclose(file);
diff --git a/mustach-json-c.c b/mustach-json-c.c
index 7fef963..a47b233 100644
--- a/mustach-json-c.c
+++ b/mustach-json-c.c
@@ -31,6 +31,8 @@ int mustach_process_json_c(const char *template, size_t length, const char *str,
     return rc;
 }
 #else
+#include <mustach/mustach.h>
+
 int mustach_process_json_c(const char *template, size_t length, const char *str, size_t len, int flags, FILE *file, char **err) {
     *err = "!mustach_json_c";
     fclose(file);