diff --git a/coders/json.c b/coders/json.c
index 73c15ae115..f18e065ac9 100644
--- a/coders/json.c
+++ b/coders/json.c
@@ -511,10 +511,14 @@ static ssize_t PrintChannelFeatures(FILE *file,const PixelChannel channel,
   "          \"average\": %.*g\n" \
   "        }\n"
 
+  char
+    *buffer;
+
   ssize_t
     n;
 
-  n=FormatLocaleFile(file,FeaturesFormat,name,
+  buffer=AcquireString((char *) NULL);
+  n=FormatLocaleString(buffer,MagickPathExtent,FeaturesFormat,name,
     PrintFeature(channel_features[channel].angular_second_moment),
     PrintFeature(channel_features[channel].contrast),
     PrintFeature(channel_features[channel].correlation),
@@ -529,6 +533,11 @@ static ssize_t PrintChannelFeatures(FILE *file,const PixelChannel channel,
     PrintFeature(channel_features[channel].measure_of_correlation_1),
     PrintFeature(channel_features[channel].measure_of_correlation_2),
     PrintFeature(channel_features[channel].maximum_correlation_coefficient));
+  (void) SubstituteString(&buffer,": -inf",": null");
+  (void) SubstituteString(&buffer,": inf",": null");
+  (void) SubstituteString(&buffer,": nan",": null");
+  n=FormatLocaleFile(file,"%s",buffer);
+  buffer=DestroyString(buffer);
   (void) FormatLocaleFile(file,"      }");
   if (separator != MagickFalse)
     (void) FormatLocaleFile(file,",");
@@ -714,12 +723,17 @@ static ssize_t PrintChannelStatistics(FILE *file,const PixelChannel channel,
   "\"standardDeviation\": %.*g,\n        \"kurtosis\": %.*g,\n        "\
   "\"skewness\": %.*g,\n        \"entropy\": %.*g\n      }"
 
+  char
+    *buffer;
+
   ssize_t
     n;
 
-  n=FormatLocaleFile(file,StatisticsFormat,name,GetMagickPrecision(),
-    channel_statistics[channel].minima == MagickMaximumValue ? 0.0 :
-    (double) ClampToQuantum(scale*channel_statistics[channel].minima),
+  buffer=AcquireString((char *) NULL);
+  n=FormatLocaleString(buffer,MagickPathExtent,StatisticsFormat,name,
+    GetMagickPrecision(),
+    channel_statistics[channel].minima == MagickMaximumValue ? 0.0 : (double)
+    ClampToQuantum(scale*channel_statistics[channel].minima),
     GetMagickPrecision(),
     channel_statistics[channel].maxima == -MagickMaximumValue ? 0.0 :
     (double) ClampToQuantum(scale*channel_statistics[channel].maxima),
@@ -731,6 +745,11 @@ static ssize_t PrintChannelStatistics(FILE *file,const PixelChannel channel,
     channel_statistics[channel].kurtosis,GetMagickPrecision(),
     channel_statistics[channel].skewness,GetMagickPrecision(),
     channel_statistics[channel].entropy);
+  (void) SubstituteString(&buffer,": -inf",": null");
+  (void) SubstituteString(&buffer,": inf",": null");
+  (void) SubstituteString(&buffer,": nan",": null");
+  n=FormatLocaleFile(file,"%s",buffer);
+  buffer=DestroyString(buffer);
   if (separator != MagickFalse)
     (void) FormatLocaleFile(file,",");
   (void) FormatLocaleFile(file,"\n");