diff --git a/Makefile.in b/Makefile.in
index 35feb6c05..65b0a875a 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -4,7 +4,7 @@ MKDIR ?= mkdir
 INSTALL=	install
 FFLAGS	= @FFLAGS@
 LDFLAGS	= @LDFLAGS@
-LIBS	= @LIBS@
+LIBS	= @LIBS@ -lfftw3f
 CPPFLAGS = @CPPFLAGS@
 CFLAGS	= @CFLAGS@
 PREFIX	= @PREFIX@