diff --git a/jni/src/jnisetenv/setenv.c b/jni/src/jnisetenv/setenv.c
index b2aeef2c..7157d6ba 100644
--- a/jni/src/jnisetenv/setenv.c
+++ b/jni/src/jnisetenv/setenv.c
@@ -13,6 +13,7 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 */
 
+#include <jni.h>
 #include <stdlib.h>
 
 JAVA_EXPORT int Java_in_celest_xash3d_XashActivity_setenv( JNIEnv* env, jclass clazz, jstring key, jstring value, jboolean overwrite )