diff --git a/math/octave-forge-ltfat/Makefile b/math/octave-forge-ltfat/Makefile
index 2b4ae57fd8e3..af8d33544f2c 100644
--- a/math/octave-forge-ltfat/Makefile
+++ b/math/octave-forge-ltfat/Makefile
@@ -13,6 +13,8 @@ COMMENT=	Octave-forge package ${OCTAVE_PKGNAME}
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKDIR}/${OCTSRC}/COPYING
 
+BROKEN_FreeBSD_12_powerpc64=	fails to compile: modules/libltfat/src/dgt_multi.c:47:31: 'cexpl' undeclared (first use in this function); did you mean 'cexpf'?
+
 LIB_DEPENDS=	libfftw3.so:math/fftw3 \
 		libportaudio.so:audio/portaudio \
 		libopenblas.so:math/openblas