diff --git a/fxjs/xfa/cfxjse_formcalc_context.cpp b/fxjs/xfa/cfxjse_formcalc_context.cpp
index 10a0743..2d2dbb9 100644
--- a/fxjs/xfa/cfxjse_formcalc_context.cpp
+++ b/fxjs/xfa/cfxjse_formcalc_context.cpp
@@ -11,6 +11,7 @@
 #include <stdlib.h>
 
 #include <algorithm>
+#include <limits>
 #include <memory>
 #include <utility>
 #include <vector>
@@ -2919,7 +2920,8 @@
   float nPrincipal = ValueToFloat(info.GetIsolate(), argOne);
   float nRate = ValueToFloat(info.GetIsolate(), argTwo);
   float nPeriods = ValueToFloat(info.GetIsolate(), argThree);
-  if ((nPrincipal <= 0) || (nRate <= 0) || (nPeriods <= 0)) {
+  if (nPrincipal <= 0 || nRate <= 0 || nPeriods <= 0 ||
+      nPeriods > static_cast<float>(std::numeric_limits<int32_t>::max())) {
     pContext->ThrowArgumentMismatchException();
     return;
   }
diff --git a/fxjs/xfa/cfxjse_formcalc_context_embeddertest.cpp b/fxjs/xfa/cfxjse_formcalc_context_embeddertest.cpp
index c23f5b2..79c8939 100644
--- a/fxjs/xfa/cfxjse_formcalc_context_embeddertest.cpp
+++ b/fxjs/xfa/cfxjse_formcalc_context_embeddertest.cpp
@@ -501,6 +501,10 @@
   ASSERT_TRUE(OpenDocument("simple_xfa.pdf"));
 
   ExecuteExpectFloat("Pmt(25000, 0.085, 12)", 3403.82145169876f);
+
+  // https://crbug.com/1293179
+  ExecuteExpectError("Pmt(2, 2, 99999997952)");
+
 #if 0
   // TODO(thestig): Investigate this case.
   ExecuteExpectFloat("Pmt(150000, 0.0475 / 12, 25 * 12)", 855.17604207164f);