diff --git a/src/groveultrasonic/javaupm_groveultrasonic.i b/src/groveultrasonic/javaupm_groveultrasonic.i
index 88b051d9..a0680e94 100644
--- a/src/groveultrasonic/javaupm_groveultrasonic.i
+++ b/src/groveultrasonic/javaupm_groveultrasonic.i
@@ -8,3 +8,14 @@
 %}
 
 %include "groveultrasonic.h"
+
+%pragma(java) jniclasscode=%{
+    static {
+        try {
+            System.loadLibrary("javaupm_groveultrasonic");
+        } catch (UnsatisfiedLinkError e) {
+            System.err.println("Native code library failed to load. \n" + e);
+            System.exit(1);
+        }
+    }
+%}
diff --git a/src/ozw/javaupm_ozw.i b/src/ozw/javaupm_ozw.i
index dcb7f3a6..1b6ccdc4 100644
--- a/src/ozw/javaupm_ozw.i
+++ b/src/ozw/javaupm_ozw.i
@@ -10,3 +10,14 @@
 %}
 
 %include "ozw.h"
+
+%pragma(java) jniclasscode=%{
+    static {
+        try {
+            System.loadLibrary("javaupm_ozw");
+        } catch (UnsatisfiedLinkError e) {
+            System.err.println("Native code library failed to load. \n" + e);
+            System.exit(1);
+        }
+    }
+%}
diff --git a/src/sx1276/javaupm_sx1276.i b/src/sx1276/javaupm_sx1276.i
index 49c8b9c6..9927af76 100644
--- a/src/sx1276/javaupm_sx1276.i
+++ b/src/sx1276/javaupm_sx1276.i
@@ -13,3 +13,14 @@
 %ignore getRxBuffer();
 
 %include "sx1276.h"
+
+%pragma(java) jniclasscode=%{
+    static {
+        try {
+            System.loadLibrary("javaupm_sx1276");
+        } catch (UnsatisfiedLinkError e) {
+            System.err.println("Native code library failed to load. \n" + e);
+            System.exit(1);
+        }
+    }
+%}