diff --git a/src/i_timer.c b/src/i_timer.c
index 078f76e9..dd514b04 100644
--- a/src/i_timer.c
+++ b/src/i_timer.c
@@ -34,6 +34,7 @@ HANDLE hTimer = NULL;
 #endif
 
 static uint64_t basecounter = 0;
+static uint64_t basecounter_scaled = 0;
 static uint64_t basefreq = 0;
 
 static int MSToTic(uint32_t time)
@@ -78,12 +79,12 @@ static uint64_t GetPerfCounter_Scaled(void)
 
     counter = SDL_GetPerformanceCounter() * time_scale / 100;
 
-    if (basecounter == 0)
+    if (basecounter_scaled == 0)
     {
-        basecounter = counter;
+        basecounter_scaled = counter;
     }
 
-    return counter - basecounter;
+    return counter - basecounter_scaled;
 }
 
 static uint32_t GetTimeMS_Scaled(void)
@@ -92,12 +93,12 @@ static uint32_t GetTimeMS_Scaled(void)
 
     counter = SDL_GetPerformanceCounter() * time_scale / 100;
 
-    if (basecounter == 0)
+    if (basecounter_scaled == 0)
     {
-        basecounter = counter;
+        basecounter_scaled = counter;
     }
 
-    return ((counter - basecounter) * 1000ull) / basefreq;
+    return ((counter - basecounter_scaled) * 1000ull) / basefreq;
 }
 
 int I_GetTime_RealTime(void)
@@ -170,7 +171,7 @@ void I_SetTimeScale(int scale)
 
     time_scale = scale;
 
-    basecounter += (GetPerfCounter_Scaled() - counter);
+    basecounter_scaled += (GetPerfCounter_Scaled() - counter);
 }
 
 void I_SetFastdemoTimer(boolean on)
@@ -188,7 +189,7 @@ void I_SetFastdemoTimer(boolean on)
 
         counter = TicToCounter(I_GetTime_FastDemo());
 
-        basecounter += (GetPerfCounter_Scaled() - counter);
+        basecounter_scaled += (GetPerfCounter_Scaled() - counter);
 
         I_GetTime = I_GetTime_Scaled;
         I_GetFracTime = I_GetFracTime_Scaled;