diff --git a/configure b/configure
index 2d1c2524fa..0b6e36d4e6 100755
--- a/configure
+++ b/configure
@@ -1131,7 +1131,7 @@ EOF
     SLIBPREF=""
     SLIBSUF=".dll"
     EXESUF=".exe"
-    if test "$force_prefix" != yes; then prefix="/c/Program Files/FFmpeg"; fi
+    if test "$force_prefix" != yes; then prefix="$PROGRAMFILES/FFmpeg"; fi
     if test "$force_libdir" != yes; then bindir="$prefix"; fi
 fi