diff --git a/compiler/extccomp.nim b/compiler/extccomp.nim
index 23f723e29f..69705db43c 100644
--- a/compiler/extccomp.nim
+++ b/compiler/extccomp.nim
@@ -567,6 +567,8 @@ proc getCompileCFileCmd*(conf: ConfigRef; cfile: Cfile): string =
     includeCmd = ""
     compilePattern = getCompilerExe(conf, c, cfile.cname)
 
+  includeCmd.add(join([CC[c].includeCmd, quoteShell(conf.projectPath.string)]))
+
   var cf = if noAbsolutePaths(conf): AbsoluteFile extractFilename(cfile.cname.string)
            else: cfile.cname