diff --git a/fxjs/xfa/cfxjse_formcalc_context.cpp b/fxjs/xfa/cfxjse_formcalc_context.cpp
index 2d2dbb9..8bbecbb 100644
--- a/fxjs/xfa/cfxjse_formcalc_context.cpp
+++ b/fxjs/xfa/cfxjse_formcalc_context.cpp
@@ -2917,17 +2917,17 @@
     return;
   }
 
-  float nPrincipal = ValueToFloat(info.GetIsolate(), argOne);
-  float nRate = ValueToFloat(info.GetIsolate(), argTwo);
-  float nPeriods = ValueToFloat(info.GetIsolate(), argThree);
+  double nPrincipal = ValueToDouble(info.GetIsolate(), argOne);
+  double nRate = ValueToDouble(info.GetIsolate(), argTwo);
+  double nPeriods = ValueToDouble(info.GetIsolate(), argThree);
   if (nPrincipal <= 0 || nRate <= 0 || nPeriods <= 0 ||
-      nPeriods > static_cast<float>(std::numeric_limits<int32_t>::max())) {
+      nPeriods > static_cast<double>(std::numeric_limits<int32_t>::max())) {
     pContext->ThrowArgumentMismatchException();
     return;
   }
 
-  float nTmp = 1 + nRate;
-  float nSum = nTmp;
+  double nTmp = 1 + nRate;
+  double nSum = nTmp;
   for (int32_t i = 0; i < nPeriods - 1; ++i)
     nSum *= nTmp;
 
diff --git a/fxjs/xfa/cfxjse_formcalc_context_embeddertest.cpp b/fxjs/xfa/cfxjse_formcalc_context_embeddertest.cpp
index 79c8939..b5cca29 100644
--- a/fxjs/xfa/cfxjse_formcalc_context_embeddertest.cpp
+++ b/fxjs/xfa/cfxjse_formcalc_context_embeddertest.cpp
@@ -501,14 +501,13 @@
   ASSERT_TRUE(OpenDocument("simple_xfa.pdf"));
 
   ExecuteExpectFloat("Pmt(25000, 0.085, 12)", 3403.82145169876f);
+  ExecuteExpectFloat("Pmt(5000, 0.01, 1)", 5050);
+  ExecuteExpectFloat("Pmt(30000.00, .085 / 12, 12 * 12)", 333.01666929435f);
+  ExecuteExpectFloat("Pmt(10000, .08 / 12, 10)", 1037.03208935916f);
+  ExecuteExpectFloat("Pmt(150000, 0.0475 / 12, 25 * 12)", 855.17604207164f);
 
   // 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);
-#endif
 }
 
 TEST_F(CFXJSE_FormCalcContextEmbedderTest, PPmt) {