diff --git a/sesman/chansrv/pulse/Makefile b/sesman/chansrv/pulse/Makefile
index 74977221..de53ff69 100644
--- a/sesman/chansrv/pulse/Makefile
+++ b/sesman/chansrv/pulse/Makefile
@@ -4,7 +4,7 @@
 
 # change this to your pulseaudio source directory
 PULSE_DIR = /tmp/pulseaudio-10.0
-CFLAGS    = -Wall -O2 -I$(PULSE_DIR) -I$(PULSE_DIR)/src -DHAVE_CONFIG_H -fPIC
+CFLAGS    = -Wall -O2 -I $(PULSE_DIR) -I $(PULSE_DIR)/src -DHAVE_CONFIG_H -fPIC
 
 all: module-xrdp-sink.so module-xrdp-source.so