diff --git a/src/optional/python-bindings/Makefile.am b/src/optional/python-bindings/Makefile.am
index 1c014141fa..374eb6f325 100644
--- a/src/optional/python-bindings/Makefile.am
+++ b/src/optional/python-bindings/Makefile.am
@@ -75,7 +75,7 @@ _gnucash_core_c_includes= \
 
 
 gnucash_core.c: $(SWIG_FILES) ${top_srcdir}/src/base-typemaps.i ${top_srcdir}/src/engine/engine-common.i $(_gnucash_core_c_includes)
-	swig -python -Wall -Werror\
+	swig -python -Wall -Werror \
 	-I$(top_srcdir)/src -I$(top_srcdir)/src/engine \
 	-I$(top_srcdir)/src/business/business-core \
 	-I${top_srcdir}/src/libqof/qof \