diff --git a/NDS.cpp b/NDS.cpp
index d1189da4..ba45c78e 100644
--- a/NDS.cpp
+++ b/NDS.cpp
@@ -1433,8 +1433,9 @@ void ARM9IOWrite32(u32 addr, u32 val)
                 IPCFIFOCnt9 |= 0x4000;
             else
             {
+                bool wasempty = IPCFIFO9->IsEmpty();
                 IPCFIFO9->Write(val);
-                if (IPCFIFOCnt7 & 0x0400)
+                if ((IPCFIFOCnt7 & 0x0400) && wasempty)
                     TriggerIRQ(1, IRQ_IPCRecv);
             }
         }
@@ -1736,8 +1737,9 @@ void ARM7IOWrite32(u32 addr, u32 val)
                 IPCFIFOCnt7 |= 0x4000;
             else
             {
+                bool wasempty = IPCFIFO7->IsEmpty();
                 IPCFIFO7->Write(val);
-                if (IPCFIFOCnt9 & 0x0400)
+                if ((IPCFIFOCnt9 & 0x0400) && wasempty)
                     TriggerIRQ(0, IRQ_IPCRecv);
             }
         }
diff --git a/melonDS.depend b/melonDS.depend
index 3e315d8e..32c870b8 100644
--- a/melonDS.depend
+++ b/melonDS.depend
@@ -67,7 +67,7 @@
 
 1481037554 c:\documents\sources\melonds\cp15.h
 
-1484524458 source:c:\documents\sources\melonds\cp15.cpp
+1484616493 source:c:\documents\sources\melonds\cp15.cpp
 	<stdio.h>
 	"NDS.h"
 	"ARM.h"