diff --git a/libsrc/c128/kernal.s b/libsrc/c128/kernal.s
index 98a802b9e..266f86911 100644
--- a/libsrc/c128/kernal.s
+++ b/libsrc/c128/kernal.s
@@ -4,7 +4,7 @@
 ; C128 kernal functions
 ;
 
-	.include "cbm_kernal.inc"
+        .include "cbm_kernal.inc"
 
         .export         C64MODE
         .export         SWAPPER
diff --git a/libsrc/c16/kernal.s b/libsrc/c16/kernal.s
index f6bd531b4..f814b2c1f 100644
--- a/libsrc/c16/kernal.s
+++ b/libsrc/c16/kernal.s
@@ -4,7 +4,7 @@
 ; C16 kernal functions
 ;
 
-	.include "cbm_kernal.inc"
+        .include "cbm_kernal.inc"
 
         .export         CINT
         .export         IOINIT
diff --git a/libsrc/c64/kernal.s b/libsrc/c64/kernal.s
index 076480357..acbf22370 100644
--- a/libsrc/c64/kernal.s
+++ b/libsrc/c64/kernal.s
@@ -4,7 +4,7 @@
 ; C64 kernal functions
 ;
 
-	.include "cbm_kernal.inc"
+        .include "cbm_kernal.inc"
 
         .export         CINT
         .export         IOINIT
diff --git a/libsrc/cbm510/kernal.s b/libsrc/cbm510/kernal.s
index 46ba8df20..921bf524e 100644
--- a/libsrc/cbm510/kernal.s
+++ b/libsrc/cbm510/kernal.s
@@ -4,7 +4,7 @@
 ; CBM610 kernal functions
 ;
 
-	.include "cbm_kernal.inc"
+        .include "cbm_kernal.inc"
 
         .export         CINT
         .export         IOINIT
diff --git a/libsrc/cbm610/kernal.s b/libsrc/cbm610/kernal.s
index 46ba8df20..921bf524e 100644
--- a/libsrc/cbm610/kernal.s
+++ b/libsrc/cbm610/kernal.s
@@ -4,7 +4,7 @@
 ; CBM610 kernal functions
 ;
 
-	.include "cbm_kernal.inc"
+        .include "cbm_kernal.inc"
 
         .export         CINT
         .export         IOINIT
diff --git a/libsrc/vic20/kernal.s b/libsrc/vic20/kernal.s
index 9f02102a9..ff16a019c 100644
--- a/libsrc/vic20/kernal.s
+++ b/libsrc/vic20/kernal.s
@@ -4,7 +4,7 @@
 ; VIC20 kernal functions
 ;
 
-	.include "cbm_kernal.inc"
+        .include "cbm_kernal.inc"
 
         .export         CINT
         .export         IOINIT