diff --git a/java/src/com/android/inputmethod/latin/UserHistoryForgettingCurveUtils.java b/java/src/com/android/inputmethod/latin/UserHistoryForgettingCurveUtils.java
index 3ae1bd336..6e71885cc 100644
--- a/java/src/com/android/inputmethod/latin/UserHistoryForgettingCurveUtils.java
+++ b/java/src/com/android/inputmethod/latin/UserHistoryForgettingCurveUtils.java
@@ -199,20 +199,20 @@ public class UserHistoryForgettingCurveUtils {
         public static final int[][] SCORE_TABLE = new int[FC_LEVEL_MAX][ELAPSED_TIME_MAX + 1];
         static {
             for (int i = 0; i < FC_LEVEL_MAX; ++i) {
-                final double initialFreq;
+                final float initialFreq;
                 if (i >= 2) {
                     initialFreq = FC_FREQ_MAX;
                 } else if (i == 1) {
-                    initialFreq = (double)FC_FREQ_MAX / 2;
+                    initialFreq = FC_FREQ_MAX / 2;
                 } else if (i == 0) {
-                    initialFreq = (double)FC_FREQ_MAX / 4;
+                    initialFreq = FC_FREQ_MAX / 4;
                 } else {
                     continue;
                 }
                 for (int j = 0; j < ELAPSED_TIME_MAX; ++j) {
-                    final double elapsedHour = j * ELAPSED_TIME_INTERVAL_HOURS;
+                    final float elapsedHours = j * ELAPSED_TIME_INTERVAL_HOURS;
                     final double freq =
-                            initialFreq * Math.pow(initialFreq, elapsedHour / HALF_LIFE_HOURS);
+                            initialFreq * Math.pow(initialFreq, elapsedHours / HALF_LIFE_HOURS);
                     final int intFreq = Math.min(FC_FREQ_MAX, Math.max(0, (int)freq));
                     SCORE_TABLE[i][j] = intFreq;
                 }
diff --git a/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java b/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
index 0c5d41a5c..2c3eee74c 100644
--- a/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
+++ b/java/src/com/android/inputmethod/latin/makedict/BinaryDictInputOutput.java
@@ -787,9 +787,9 @@ public class BinaryDictInputOutput {
         // (discretizedFrequency + 0.5) times this value to get the median value of the step,
         // which is the best approximation. This is how we get the most precise result with
         // only four bits.
-        final double stepSize =
-                (MAX_TERMINAL_FREQUENCY - unigramFrequency) / (1.5 + MAX_BIGRAM_FREQUENCY);
-        final double firstStepStart = 1 + unigramFrequency + (stepSize / 2.0);
+        final float stepSize =
+                (MAX_TERMINAL_FREQUENCY - unigramFrequency) / (1.5f + MAX_BIGRAM_FREQUENCY);
+        final float firstStepStart = 1 + unigramFrequency + (stepSize / 2.0f);
         final int discretizedFrequency = (int)((bigramFrequency - firstStepStart) / stepSize);
         // If the bigram freq is less than half-a-step higher than the unigram freq, we get -1
         // here. The best approximation would be the unigram freq itself, so we should not