diff --git a/logback-core/src/main/java/ch/qos/logback/core/encoder/JsonEscapeUtil.java b/logback-core/src/main/java/ch/qos/logback/core/encoder/JsonEscapeUtil.java
index d7e3ee13c3..7432cf5d2e 100644
--- a/logback-core/src/main/java/ch/qos/logback/core/encoder/JsonEscapeUtil.java
+++ b/logback-core/src/main/java/ch/qos/logback/core/encoder/JsonEscapeUtil.java
@@ -24,15 +24,15 @@ public class JsonEscapeUtil {
 
     // From RFC-8259 page 5
 
-    //  %x22 /          ; "    quotation mark  U+0022
-    //  %x5C /          ; \    reverse solidus U+005C
-    //  %x2F /          ; /    solidus         U+002F
+    //  "    quotation mark  U+0022 -- escaped as \"
+    //  \    reverse solidus U+005C -- escaped as \\
+    //  /    solidus         U+002F -- escaped as \/
 
-    //  %x62 /          ; b    backspace       U+0008
-    //  %x74 /          ; t    tab             U+0009
-    //  %x6E /          ; n    line feed       U+000A
-    //  %x66 /          ; f    form feed       U+000C
-    //  %x72 /          ; r    carriage return U+000D
+    //  backspace       U+0008  -- escaped as \b
+    //  tab             U+0009  -- escaped as \t
+    //  line feed       U+000A  -- escaped as \n
+    //  form feed       U+000C -- escaped as \f
+    //  carriage return U+000D -- escaped as \r
 
     static {
         for (char c = 0; c < ESCAPE_CODES_COUNT; c++) {
@@ -80,13 +80,19 @@ private static String _computeEscapeCodeBelowASCII32(char c) {
     //  %x22 /          ; "    quotation mark  U+0022
     //  %x5C /          ; \    reverse solidus U+005C
 
+    //  "    quotation mark  U+0022 -- escaped as \"
+    //  \    reverse solidus U+005C -- escaped as \\
+    //  /    solidus         U+002F -- escaped as \/
+
     static String getObligatoryEscapeCode(char c) {
         if (c < 32)
             return ESCAPE_CODES[c];
         if (c == 0x22)
             return "\\\"";
-        if (c == 0x5C)
+        if (c == 0x2F)
             return "\\/";
+        if (c == 0x5C)
+            return "\\\\";
 
         return null;
     }
diff --git a/logback-core/src/test/java/ch/qos/logback/core/encoder/JsonEscapeUtilTest.java b/logback-core/src/test/java/ch/qos/logback/core/encoder/JsonEscapeUtilTest.java
index fcad313720..2a598a1907 100644
--- a/logback-core/src/test/java/ch/qos/logback/core/encoder/JsonEscapeUtilTest.java
+++ b/logback-core/src/test/java/ch/qos/logback/core/encoder/JsonEscapeUtilTest.java
@@ -21,7 +21,7 @@
 class JsonEscapeUtilTest {
 
     @Test
-    public void smokeTestEscapeCodes() {
+    public void smokeTestEscapeCodesUnder32() {
         assertEquals("\\u0001", JsonEscapeUtil.ESCAPE_CODES[1]);
         assertEquals("\\u0005", JsonEscapeUtil.ESCAPE_CODES[5]);
         assertEquals("\\b", JsonEscapeUtil.ESCAPE_CODES[8]);
@@ -49,6 +49,22 @@ public void testEscapingLF() {
         assertEquals("{\\nhello: "+'\\'+'"'+"wo\\nrld\\\"}", JsonEscapeUtil.jsonEscapeString(input));
     }
 
+    @Test
+    public void testBackslash() {
+        String input = "{x:com\\foo}";
+        System.out.println(input);
+        assertEquals("{x:com\\\\foo}", JsonEscapeUtil.jsonEscapeString(input));
+    }
+
+    @Test
+    public void testForwardslash() {
+        String input = "{x:com/foo}";
+        System.out.println(input);
+        assertEquals("{x:com\\/foo}", JsonEscapeUtil.jsonEscapeString(input));
+    }
+
+
+
     @Test
     public void testEscapingTab() {
         String input = "{hello: \"\tworld\"}";