diff --git a/src/drivers/win/ram_search.cpp b/src/drivers/win/ram_search.cpp
index 92c72dc6..9a9c6e5b 100644
--- a/src/drivers/win/ram_search.cpp
+++ b/src/drivers/win/ram_search.cpp
@@ -309,11 +309,11 @@ void UpdateRegionT(const MemoryRegion& region, const MemoryRegion* nextRegionPtr
 					if(i >= indexEnd+k)
 						continue;
 					int m = (j-k+sizeof(compareType)) & (sizeof(compareType)-1);
-					if(nextValidChange[m]+sizeof(compareType) <= i+sizeof(compareType)) // if we didn't already increase the change count for this entry
+					if(nextValidChange[m] <= i) // if we didn't already increase the change count for this entry
 					{
 						//if(s_numChanges[i-k] != 0xFFFF)
 							s_numChanges[i-k]++; // increase the change count for this entry
-						nextValidChange[m] = i+sizeof(compareType); // and remember not to increase it again
+						nextValidChange[m] = i-k+sizeof(compareType); // and remember not to increase it again
 					}
 				}
 			}