diff --git a/mozilla/layout/base/nsPresShell.cpp b/mozilla/layout/base/nsPresShell.cpp
index 91ff3bce57d..a0946254262 100644
--- a/mozilla/layout/base/nsPresShell.cpp
+++ b/mozilla/layout/base/nsPresShell.cpp
@@ -5302,7 +5302,9 @@ PresShell::ProcessReflowCommands(PRBool aInterruptible)
       ProcessReflowCommand(mReflowCommands, aInterruptible, desiredSize, maxSize, *rcx);
       if (aInterruptible) {
         LL_I2L(maxTime, gMaxRCProcessingTime);
-        if (LL_CMP(mAccumulatedReflowTime, >, maxTime))
+        PRInt64 temp;
+        LL_I2L(temp, mAccumulatedReflowTime);
+        if (LL_CMP(temp, >, maxTime))
           break;          
       }
     }
diff --git a/mozilla/layout/html/base/src/nsPresShell.cpp b/mozilla/layout/html/base/src/nsPresShell.cpp
index 91ff3bce57d..a0946254262 100644
--- a/mozilla/layout/html/base/src/nsPresShell.cpp
+++ b/mozilla/layout/html/base/src/nsPresShell.cpp
@@ -5302,7 +5302,9 @@ PresShell::ProcessReflowCommands(PRBool aInterruptible)
       ProcessReflowCommand(mReflowCommands, aInterruptible, desiredSize, maxSize, *rcx);
       if (aInterruptible) {
         LL_I2L(maxTime, gMaxRCProcessingTime);
-        if (LL_CMP(mAccumulatedReflowTime, >, maxTime))
+        PRInt64 temp;
+        LL_I2L(temp, mAccumulatedReflowTime);
+        if (LL_CMP(temp, >, maxTime))
           break;          
       }
     }