diff --git a/src/testzzuf/Makefile.am b/src/testzzuf/Makefile.am
index 5aa7cfa7..20d58988 100644
--- a/src/testzzuf/Makefile.am
+++ b/src/testzzuf/Makefile.am
@@ -8,10 +8,10 @@ SUBDIRS  = .
 ZZUF_SEED = 0
 
 # Additional flags for zzuf
-ZZUF_FLAGS =
+ZZUF_FLAGS = 
 
 # Additional flags for socat (if socat is used)
-SOCAT_FLAGS =
+SOCAT_FLAGS = 
 
 if FORCE_USE_ZZUF_SOCAT
 TEST_RUNNER_SCRIPT = zzuf_socat_test_runner.sh