diff --git a/make_helpers/windows.mk b/make_helpers/windows.mk
index 7ed8e84..a75a740 100644
--- a/make_helpers/windows.mk
+++ b/make_helpers/windows.mk
@@ -70,7 +70,7 @@
 
     nul := nul
 
-    which = $(shell where $(1) 2>$(nul))
+    which = $(shell where "$(1)" 2>$(nul))
 endif
 
 # Because git is not available from CMD.EXE, we need to avoid