diff --git a/compiler/packages/pastojs/src/pas2jsfilecache.pp b/compiler/packages/pastojs/src/pas2jsfilecache.pp
index 88546e0..fe1992a 100644
--- a/compiler/packages/pastojs/src/pas2jsfilecache.pp
+++ b/compiler/packages/pastojs/src/pas2jsfilecache.pp
@@ -257,7 +257,7 @@ type
     function FindCustomJSFileName(const aFilename: string): String; override;
     function FindUnitJSFileName(const aUnitFilename: string): String; override;
     function FindUnitFileName(const aUnitname, InFilename, ModuleDir: string; out IsForeign: boolean): String; override;
-    function FindIncludeFileName(const aFilename: string): String; override;
+    function FindIncludeFileName(const aFilename, ModuleDir: string): String; override;
     function AddIncludePaths(const Paths: string; FromCmdLine: boolean; out ErrorMsg: string): boolean;
     function AddUnitPaths(const Paths: string; FromCmdLine: boolean; out ErrorMsg: string): boolean;
     function AddSrcUnitPaths(const Paths: string; FromCmdLine: boolean; out ErrorMsg: string): boolean;
@@ -1812,7 +1812,8 @@ begin
     UsePointDirectory, true, RelPath);
 end;
 
-function TPas2jsFilesCache.FindIncludeFileName(const aFilename: string): String;
+function TPas2jsFilesCache.FindIncludeFileName(const aFilename,
+  ModuleDir: string): String;
 
   function SearchCasedInIncPath(const Filename: string): string;
   var
@@ -1820,9 +1821,9 @@ function TPas2jsFilesCache.FindIncludeFileName(const aFilename: string): String;
   begin
     // file name is relative
     // first search in the same directory as the unit
-    if BaseDirectory<>'' then
+    if ModuleDir<>'' then
       begin
-      Result:=BaseDirectory+Filename;
+      Result:=IncludeTrailingPathDelimiter(ModuleDir)+Filename;
       if SearchLowUpCase(Result) then exit;
       end;
     // then search in include path
diff --git a/compiler/packages/pastojs/src/pas2jsfs.pp b/compiler/packages/pastojs/src/pas2jsfs.pp
index 090a046..357f3b7 100644
--- a/compiler/packages/pastojs/src/pas2jsfs.pp
+++ b/compiler/packages/pastojs/src/pas2jsfs.pp
@@ -96,7 +96,7 @@ Type
     function FindSourceFileName(const aFilename: string): String; virtual; abstract;
   Public
     // Public Abstract. Must be overridden
-    function FindIncludeFileName(const aFilename: string): String; virtual; abstract;
+    function FindIncludeFileName(const aFilename, ModuleDir: string): String; virtual; abstract;
     function LoadFile(Filename: string; Binary: boolean = false): TPas2jsFile; virtual; abstract;
     Function FileExists(Const aFileName: String): Boolean; virtual; abstract;
     function FindUnitJSFileName(const aUnitFilename: string): String; virtual; abstract;
@@ -416,7 +416,7 @@ var
   Filename: String;
 begin
   Result:=nil;
-  Filename:=FS.FindIncludeFileName(aFilename);
+  Filename:=FS.FindIncludeFileName(aFilename,BaseDirectory);
   if Filename='' then exit;
   try
     Result:=FindSourceFile(Filename);
@@ -433,7 +433,7 @@ end;
 function TPas2jsFSResolver.FindIncludeFileName(const aFilename: string): String;
 
 begin
-  Result:=FS.FindIncludeFileName(aFilename);
+  Result:=FS.FindIncludeFileName(aFilename,BaseDirectory);
 end;
 
 
diff --git a/compiler/packages/pastojs/tests/tcmodules.pas b/compiler/packages/pastojs/tests/tcmodules.pas
index 9b25b48..9f89e3e 100644
--- a/compiler/packages/pastojs/tests/tcmodules.pas
+++ b/compiler/packages/pastojs/tests/tcmodules.pas
@@ -3727,8 +3727,11 @@ begin
     '  s = ''end'';',
     '  s = "end";',
     '  return Result;',
-    '};'
-    ]),
+    '};',
+    'this.Fly = function () {',
+    '  return;',
+    '};',
+    '']),
     LinesToStr([
     ''
     ]));
diff --git a/compiler/packages/pastojs/tests/tcunitsearch.pas b/compiler/packages/pastojs/tests/tcunitsearch.pas
index 8d2c20d..2f40416 100644
--- a/compiler/packages/pastojs/tests/tcunitsearch.pas
+++ b/compiler/packages/pastojs/tests/tcunitsearch.pas
@@ -143,6 +143,7 @@ type
     procedure TestUS_Program_FU;
     procedure TestUS_Program_FU_o;
     procedure TestUS_Program_FE_o;
+    procedure TestUS_IncludeSameDir;
 
     procedure TestUS_UsesInFile;
     procedure TestUS_UsesInFile_Duplicate;
@@ -695,6 +696,27 @@ begin
   AssertNotNull('foo.js not found',FindFile('foo.js'));
 end;
 
+procedure TTestCLI_UnitSearch.TestUS_IncludeSameDir;
+begin
+  AddUnit('system.pp',[''],['']);
+  AddFile('sub/defines.inc',[
+    '{$Define foo}',
+    '']);
+  AddUnit('sub/unit1.pas',
+  ['{$I defines.inc}',
+   '{$ifdef foo}',
+   'var a: longint;',
+   '{$endif}'],
+  ['']);
+  AddFile('test1.pas',[
+    'uses unit1;',
+    'begin',
+    '  a:=3;',
+    'end.']);
+  AddDir('lib');
+  Compile(['test1.pas','-Fusub','-FElib','-ofoo.js']);
+end;
+
 procedure TTestCLI_UnitSearch.TestUS_UsesInFile;
 begin
   AddUnit('system.pp',[''],['']);