diff --git a/src/events.rs b/src/events.rs
index 1dd3acd0..2dae7081 100644
--- a/src/events.rs
+++ b/src/events.rs
@@ -220,6 +220,10 @@ impl EventBuffer {
             )
         };
 
+        if current_packet_ptr.is_null() {
+            panic!("MIDIEventListAdd was unable to add the event")
+        }
+
         self.current_packet_offset = unsafe {
             (current_packet_ptr as *const u8).offset_from(packet_list_ptr as *const u8) as usize
         };
diff --git a/src/packets.rs b/src/packets.rs
index 2e1a50a1..a1c85ee4 100644
--- a/src/packets.rs
+++ b/src/packets.rs
@@ -205,6 +205,11 @@ impl PacketBuffer {
                 data.as_ptr(),
             )
         };
+
+        if current_packet_ptr.is_null() {
+            panic!("MIDIPacketListAdd was unable to add the packet")
+        }
+
         let current_packet_offset = unsafe {
             (current_packet_ptr as *const u8).offset_from(packet_list_ptr as *const u8) as usize
         };
@@ -281,6 +286,10 @@ impl PacketBuffer {
             )
         };
 
+        if current_packet_ptr.is_null() {
+            panic!("MIDIPacketListAdd was unable to add the packet")
+        }
+
         self.current_packet_offset = unsafe {
             (current_packet_ptr as *const u8).offset_from(packet_list_ptr as *const u8) as usize
         };