diff --git a/src/ShellCheck/Analytics.hs b/src/ShellCheck/Analytics.hs
index 652c2fb..188d683 100644
--- a/src/ShellCheck/Analytics.hs
+++ b/src/ShellCheck/Analytics.hs
@@ -2049,6 +2049,8 @@ prop_checkSpacefulness43= verifyNotTree checkSpacefulness "$foo=42"
 prop_checkSpacefulness44= verifyTree checkSpacefulness "#!/bin/sh\nexport var=$value"
 prop_checkSpacefulness45= verifyNotTree checkSpacefulness "wait -zzx -p foo; echo $foo"
 prop_checkSpacefulness46= verifyNotTree checkSpacefulness "x=0; (( x += 1 )); echo $x"
+prop_checkSpacefulness47= verifyNotTree checkSpacefulness "x=0; (( x-- )); echo $x"
+prop_checkSpacefulness48= verifyNotTree checkSpacefulness "x=0; (( ++x )); echo $x"
 
 data SpaceStatus = SpaceSome | SpaceNone | SpaceEmpty deriving (Eq)
 instance Semigroup SpaceStatus where
@@ -2139,7 +2141,6 @@ checkSpacefulness' onFind params t =
       where
         emit x = tell [x]
 
-    writeF _ (TA_Assignment {}) name _ = setSpaces name SpaceNone >> return []
     writeF _ _ name (DataString SourceExternal) = setSpaces name SpaceSome >> return []
     writeF _ _ name (DataString SourceInteger) = setSpaces name SpaceNone >> return []
 
diff --git a/src/ShellCheck/AnalyzerLib.hs b/src/ShellCheck/AnalyzerLib.hs
index 687859f..9b53f9f 100644
--- a/src/ShellCheck/AnalyzerLib.hs
+++ b/src/ShellCheck/AnalyzerLib.hs
@@ -511,13 +511,11 @@ getModifiedVariables t =
         T_SimpleCommand {} ->
             getModifiedVariableCommand t
 
-        TA_Unary _ "++|" v@(TA_Variable _ name _)  ->
-            [(t, v, name, DataString $ SourceFrom [v])]
-        TA_Unary _ "|++" v@(TA_Variable _ name _)  ->
-            [(t, v, name, DataString $ SourceFrom [v])]
+        TA_Unary _ op v@(TA_Variable _ name _) | "--" `isInfixOf` op || "++" `isInfixOf` op ->
+            [(t, v, name, DataString SourceInteger)]
         TA_Assignment _ op (TA_Variable _ name _) rhs -> do
             guard $ op `elem` ["=", "*=", "/=", "%=", "+=", "-=", "<<=", ">>=", "&=", "^=", "|="]
-            return (t, t, name, DataString $ SourceFrom [rhs])
+            return (t, t, name, DataString SourceInteger)
 
         T_BatsTest {} -> [
             (t, t, "lines", DataArray SourceExternal),