diff --git a/pcsx2/CDVD/CDVD.cpp b/pcsx2/CDVD/CDVD.cpp
index 73fbe508f8..b5a9975d3f 100644
--- a/pcsx2/CDVD/CDVD.cpp
+++ b/pcsx2/CDVD/CDVD.cpp
@@ -975,7 +975,7 @@ u8 monthmap[13] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
 
 void cdvdVsync() {
 	cdvd.RTCcount++;
-	if (cdvd.RTCcount < ((gsVideoMode == GS_VideoMode::NTSC) ? 60 : 50)) return;
+	if (cdvd.RTCcount < (GetVerticalFrequency().ToIntRounded())) return;
 	cdvd.RTCcount = 0;
 
 	if ( cdvd.Status == CDVD_STATUS_TRAY_OPEN )
diff --git a/pcsx2/CDVD/CDVD.h b/pcsx2/CDVD/CDVD.h
index 24a2e12bbf..7714d6fb36 100644
--- a/pcsx2/CDVD/CDVD.h
+++ b/pcsx2/CDVD/CDVD.h
@@ -100,6 +100,8 @@ struct cdvdStruct {
 	u8 CReadWrite;
 	u8 CNumBlocks;
 
+	// Calculates the number of Vsyncs and once it reaches a total number of Vsyncs worth a second with respect to
+	// the videomode's vertical frequency, it updates the real time clock.
 	int RTCcount;
 	cdvdRTC RTC;
 
diff --git a/pcsx2/Counters.h b/pcsx2/Counters.h
index e1ff51af07..bc19e92d4d 100644
--- a/pcsx2/Counters.h
+++ b/pcsx2/Counters.h
@@ -123,7 +123,6 @@ struct SyncCounter
 #define MODE_HBLANK		0x1		//Set for the remaining ~1/6 of 1 Scanline
 
 
-extern Fixed100 GetVerticalFrequency();
 extern Counter counters[4];
 extern SyncCounter hsyncCounter;
 extern SyncCounter vsyncCounter;
diff --git a/pcsx2/GS.h b/pcsx2/GS.h
index ad90b41c31..6ab029b92e 100644
--- a/pcsx2/GS.h
+++ b/pcsx2/GS.h
@@ -19,6 +19,7 @@
 #include "System/SysThreads.h"
 #include "Gif.h"
 
+extern Fixed100 GetVerticalFrequency();
 extern __aligned16 u8 g_RealGSMem[Ps2MemSize::GSregs];
 
 enum CSR_FifoState