diff --git a/changes/10.4.0.md b/changes/10.4.0.md
index 63048b57d..78def9528 100644
--- a/changes/10.4.0.md
+++ b/changes/10.4.0.md
@@ -1,2 +1,3 @@
  * Change the shape of Eng (`U+014A`) into "N with Hook", to follow Unicode code chart (#1239).
- * Increase shoulder arc thickness of lowercase `r` for better thickness contrast (#1243).
\ No newline at end of file
+ * Increase shoulder arc thickness of lowercase `r` for better thickness contrast (#1243).
+ * Fixed width and removal logic for Long Leftwards Arrow (`U+27F5`) and Long Rightwards Arrow (`U+27F6`) (#1245).
diff --git a/doc/custom-build.md b/doc/custom-build.md
index 75d6c4201..fb0ac2dab 100644
--- a/doc/custom-build.md
+++ b/doc/custom-build.md
@@ -46,6 +46,7 @@ Inside the plan, top-level properties include:
 
 * `family`: String, defines the family name of your custom variant.
 * `spacing`: Optional, String, denotes the spacing of the custom variant. Valid values include:
+  - `normal`: The normal monospace font.
   - `quasi-proportional`: The font will become quasi-proportional.
   - `term`: Make the symbols' width suitable for terminal emulators. Arrows and geometric symbols will become narrower.
   - `fontconfig-mono`: Apply `term` spacing changes and further apply changes to be compatible with FontConfig's Mono spacing, which recognizes a font as monospace if and only if its every non-combining characters having the same width. The changes include:
diff --git a/font-src/glyphs/symbol/arrow.ptl b/font-src/glyphs/symbol/arrow.ptl
index b321e95c3..a14c4f9e0 100644
--- a/font-src/glyphs/symbol/arrow.ptl
+++ b/font-src/glyphs/symbol/arrow.ptl
@@ -286,9 +286,11 @@ glyph-block Symbol-Arrow : for-width-kinds WideWidth1
 		MkArrow ArrowShape [MangleName 'arrowDownRight']  [MangleUnicode 0x2198] arrowDiagSB arrowDiagTop arrowDiagRSB arrowDiagBot
 		MkArrow ArrowShape [MangleName 'arrowDownLeft']   [MangleUnicode 0x2199] arrowDiagRSB arrowDiagTop arrowDiagSB arrowDiagBot
 
-		define kLong 0.5
-		MkArrow ArrowShape [MangleName 'longArrowLeft']   [MangleUnicode 0x27F5] [mix MosaicWidth arrowRSB kLong] SymbolMid [mix 0 arrowSB kLong] SymbolMid
-		MkArrow ArrowShape [MangleName 'longArrowRight']  [MangleUnicode 0x27F6] [mix 0 arrowSB kLong] SymbolMid [mix MosaicWidth arrowRSB kLong] SymbolMid
+		# These arrows are always wide. In force-monospace variants they will be deleted
+		if (MosaicWidthScalar > 1 && !para.forceMonospace) : begin
+			define kLong 0.5
+			MkArrow ArrowShape 'longArrowLeft'  0x27F5 [mix MosaicWidth arrowRSB kLong] SymbolMid [mix 0 arrowSB kLong] SymbolMid
+			MkArrow ArrowShape 'longArrowRight' 0x27F6 [mix 0 arrowSB kLong] SymbolMid [mix MosaicWidth arrowRSB kLong] SymbolMid
 
 	do "Dash Straight Arrow"
 		MkArrow DashArrowShape [MangleName 'dashArrowLeft']  [MangleUnicode 0x21E0] arrowRSB SymbolMid arrowSB SymbolMid
diff --git a/package-lock.json b/package-lock.json
index 18e3d1a27..71f88695b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "iosevka",
-  "version": "10.3.4",
+  "version": "10.4.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {