diff --git a/MagickWand/mogrify.c b/MagickWand/mogrify.c
index 1b1cf52af7..d2244bb6eb 100644
--- a/MagickWand/mogrify.c
+++ b/MagickWand/mogrify.c
@@ -1217,7 +1217,11 @@ WandExport MagickBooleanType MogrifyImage(ImageInfo *image_info,const int argc,
               }
             for (p=start_color; (*p != '-') && (*p != '\0'); p++)
               if (*p == '(')
-                for (p++; (*p != ')') && (*p != '\0'); p++);
+                {
+                  for (p++; (*p != ')') && (*p != '\0'); p++);
+                  if (*p == '\0')
+                    break;
+                }
             if (*p == '-')
               (void) CopyMagickString(stop_color,p+1,MagickPathExtent);
             *p='\0';
diff --git a/MagickWand/operation.c b/MagickWand/operation.c
index 74f2f98ba5..fbee9d8693 100644
--- a/MagickWand/operation.c
+++ b/MagickWand/operation.c
@@ -2088,7 +2088,11 @@ static MagickBooleanType CLISimpleOperatorImage(MagickCLI *cli_wand,
             }
           for (p=start_color; (*p != '-') && (*p != '\0'); p++)
             if (*p == '(')
-              for (p++; (*p != ')') && (*p != '\0'); p++);
+              {
+                for (p++; (*p != ')') && (*p != '\0'); p++);
+                if (*p == '\0')
+                  break;
+              }
           if (*p == '-')
             (void) CopyMagickString(stop_color,p+1,MagickPathExtent);
           *p='\0';
diff --git a/coders/gradient.c b/coders/gradient.c
index 70a3ca04c4..28a35afcc1 100644
--- a/coders/gradient.c
+++ b/coders/gradient.c
@@ -203,7 +203,11 @@ static Image *ReadGRADIENTImage(const ImageInfo *image_info,
         MagickPathExtent);
       for (p=start_color; (*p != '-') && (*p != '\0'); p++)
         if (*p == '(')
-          for (p++; (*p != ')') && (*p != '\0'); p++);
+          {
+            for (p++; (*p != ')') && (*p != '\0'); p++);
+            if (*p == '\0')
+              break;
+          }
       if (*p == '-')
         (void) CopyMagickString(stop_color,p+1,MagickPathExtent);
       *p='\0';