diff --git a/debian/patches/debian/0001-build.patch b/debian/patches/debian/0001-build.patch
index 8449f47..90e7cd6 100644
--- a/debian/patches/debian/0001-build.patch
+++ b/debian/patches/debian/0001-build.patch
@@ -16,4 +16,4 @@ diff -Naurp pdlzip.orig/configure pdlzip/configure
 +#LDFLAGS=
  
  # checking whether we are using GNU C.
- if /bin/sh -c "${CC} --version" > /dev/null 2>&1 ; then true
+ /bin/sh -c "${CC} --version" > /dev/null 2>&1 ||