diff --git a/src/system/boot/platform/bios_ia32/mmu.cpp b/src/system/boot/platform/bios_ia32/mmu.cpp
index aa25bc1e9a..100c3512e6 100644
--- a/src/system/boot/platform/bios_ia32/mmu.cpp
+++ b/src/system/boot/platform/bios_ia32/mmu.cpp
@@ -474,7 +474,7 @@ mmu_free(void *virtualAddress, size_t size)
 		address += B_PAGE_SIZE;
 	}
 
-	if (address + size == sNextVirtualAddress) {
+	if (address == sNextVirtualAddress) {
 		// we can actually reuse the virtual address space
 		sNextVirtualAddress -= size;
 	}