diff --git a/common/gbr_metadata.cpp b/common/gbr_metadata.cpp
index 275fa80c2f..9b66189f22 100644
--- a/common/gbr_metadata.cpp
+++ b/common/gbr_metadata.cpp
@@ -31,7 +31,7 @@
 #include <wx/datetime.h>
 
 #include <gbr_metadata.h>
-#include <core\utf8.h>
+#include <core/utf8.h>
 
 
 wxString GbrMakeCreationDateAttributeString( GBR_NC_STRING_FORMAT aFormat )
diff --git a/common/swig/kicad.i b/common/swig/kicad.i
index a0882395ad..0e54ecbfac 100644
--- a/common/swig/kicad.i
+++ b/common/swig/kicad.i
@@ -164,8 +164,8 @@ typedef long time_t;
 %rename(utf8_to_wxstring) operator wxString () const;
 %rename(utf8_to_string) operator const std::string& () const;
 
-#include <core\utf8.h>
-%include <core\utf8.h>
+#include <core/utf8.h>
+%include <core/utf8.h>
 
 
 %extend UTF8
diff --git a/cvpcb/cvpcb_association.h b/cvpcb/cvpcb_association.h
index 25462a9b00..ab15aedfda 100644
--- a/cvpcb/cvpcb_association.h
+++ b/cvpcb/cvpcb_association.h
@@ -22,7 +22,7 @@
 #define CVPCB_ASSOCIATION_H
 
 #include <lib_id.h>
-#include <core\utf8.h>
+#include <core/utf8.h>
 
 /**
  * A class to define a footprint association to be made in cvpcb.
diff --git a/include/font/stroke_font.h b/include/font/stroke_font.h
index 170b1f18eb..701c2eb035 100644
--- a/include/font/stroke_font.h
+++ b/include/font/stroke_font.h
@@ -33,7 +33,7 @@
 #include <map>
 #include <deque>
 #include <algorithm>
-#include <core\utf8.h>
+#include <core/utf8.h>
 #include <math/box2.h>
 #include <font/font.h>
 
diff --git a/include/lib_id.h b/include/lib_id.h
index 46f500f314..a66aaba028 100644
--- a/include/lib_id.h
+++ b/include/lib_id.h
@@ -27,7 +27,7 @@
 #define _LIB_ID_H_
 
 #include <richio.h>
-#include <core\utf8.h>
+#include <core/utf8.h>
 
 /**
  * A logical library item identifier and consists of various portions much like a URI.
diff --git a/include/markup_parser.h b/include/markup_parser.h
index 300269aac8..174dffad4f 100644
--- a/include/markup_parser.h
+++ b/include/markup_parser.h
@@ -25,7 +25,7 @@
 #include <pegtl/contrib/parse_tree.hpp>
 #include <iostream>
 #include <string>
-#include <core\utf8.h>
+#include <core/utf8.h>
 
 
 namespace MARKUP
diff --git a/include/richio.h b/include/richio.h
index 49738b6361..7512ef9799 100644
--- a/include/richio.h
+++ b/include/richio.h
@@ -30,7 +30,7 @@
 
 
 #include <vector>
-#include <core\utf8.h>
+#include <core/utf8.h>
 
 // I really did not want to be dependent on wxWidgets in richio
 // but the errorText needs to be wide char so wxString rules.
diff --git a/include/string_utf8_map.h b/include/string_utf8_map.h
index 8aa31cc134..78b8dbfbe7 100644
--- a/include/string_utf8_map.h
+++ b/include/string_utf8_map.h
@@ -23,7 +23,7 @@
 
 #include <string>
 #include <map>
-#include <core\utf8.h>
+#include <core/utf8.h>
 
 
 /**
diff --git a/libs/core/utf8.cpp b/libs/core/utf8.cpp
index c20ee2c9d1..d3b09356b3 100644
--- a/libs/core/utf8.cpp
+++ b/libs/core/utf8.cpp
@@ -22,7 +22,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  */
 
-#include <core\utf8.h>
+#include <core/utf8.h>
 #include <wx/strconv.h>
 #include <wx/buffer.h>
 #include <vector>
diff --git a/qa/tests/common/test_utf8.cpp b/qa/tests/common/test_utf8.cpp
index afed6fd8f9..93865540c2 100644
--- a/qa/tests/common/test_utf8.cpp
+++ b/qa/tests/common/test_utf8.cpp
@@ -23,7 +23,7 @@
 
 #include <qa_utils/wx_utils/unit_test_utils.h>
 
-#include <core\utf8.h>
+#include <core/utf8.h>
 
 #include <algorithm>
 #include <iostream>
diff --git a/tools/utf8_tests.cpp b/tools/utf8_tests.cpp
index 221367a253..00390e2afd 100644
--- a/tools/utf8_tests.cpp
+++ b/tools/utf8_tests.cpp
@@ -1,7 +1,7 @@
 
 
 #include <string>
-#include <core\utf8.h>
+#include <core/utf8.h>
 #include <wx/string.h>