diff --git a/bearssl.nimble b/bearssl.nimble
index ff41ebd..1587639 100644
--- a/bearssl.nimble
+++ b/bearssl.nimble
@@ -1,5 +1,5 @@
 # Package
-version       = "0.1.4"
+version       = "0.1.5"
 author        = "Status Research & Development GmbH"
 description   = "BearSSL wrapper"
 license       = "MIT or Apache License 2.0"
diff --git a/bearssl/decls.nim b/bearssl/decls.nim
index 77a9f4c..5fbdc06 100644
--- a/bearssl/decls.nim
+++ b/bearssl/decls.nim
@@ -8,7 +8,7 @@
 ## those terms.
 ## This module implements interface with BearSSL library sources.
 import strutils
-from os import DirSep
+from os import DirSep, quoteShell
 
 const
   bearPath = currentSourcePath.rsplit(DirSep, 1)[0] & DirSep &
@@ -31,9 +31,9 @@ const
   bearToolsPath = bearPath & "tools" & DirSep
   bearRootPath = bearSrcPath & DirSep
 
-{.passC: "-I" & bearSrcPath}
-{.passC: "-I" & bearIncPath}
-{.passC: "-I" & bearPath & "tools"}
+{.passC: "-I" & quoteShell(bearSrcPath)}
+{.passC: "-I" & quoteShell(bearIncPath)}
+{.passC: "-I" & quoteShell(bearPath & "tools")}
 
 when defined(windows):
   {.passC: "-DBR_USE_WIN32_TIME=1".}