diff --git a/Makefile.standard_app b/Makefile.standard_app
index 018b218ca..c6991874d 100644
--- a/Makefile.standard_app
+++ b/Makefile.standard_app
@@ -75,7 +75,8 @@ endif
 #                          STANDARD DEFINES                         #
 #####################################################################
 DEFINES += $(DEFINES_LIB)
-DEFINES += APPNAME=\"$(APPNAME)\"
+# Added directly as a CFLAG because it might contain spaces
+CFLAGS += -DAPPNAME=\"$(APPNAME)\"
 DEFINES += APPVERSION=\"$(APPVERSION)\"
 DEFINES += MAJOR_VERSION=$(APPVERSION_M) MINOR_VERSION=$(APPVERSION_N) PATCH_VERSION=$(APPVERSION_P)
 DEFINES += IO_HID_EP_LENGTH=64