diff --git a/base/proposal.dtx b/base/proposal.dtx
index 14820dd..bb4f835 100644
--- a/base/proposal.dtx
+++ b/base/proposal.dtx
@@ -697,13 +697,14 @@
 \renewcommand{\headrulewidth}{0pt}
 \renewcommand{\footrulewidth}{0.4pt}
 \else
-\fancyhead[RE,LO]{\prop@gen@acronym}
+\fancyhead[RE,LO]{\ifx\prop@gen@acronym\@empty\prop@gen@acronym\fi}
 \fancyhfoffset{0pt}
 \fi
 \fancyfoot[C]{}
 \newcommand\prop@of@pages[2]{page~#1\ifofpage~of~#2\fi}
 \ifgrantagreement
-\fancyfoot[L]{\prop@gen@proposalnumber\quad \prop@gen@acronym\quad --\quad Part B}
+\fancyfoot[L]{\prop@gen@proposalnumber%
+\ifx\prop@gen@acronym\quad \prop@gen@acronym\fi\quad --\quad Part B}
 \fancyfoot[R]{\thepage}
 \else
 \fancyhead[LE,RO]{\prop@of@pages\thepage{\pdataref@num{prop}{page}{last}}}
diff --git a/base/proposal.pdf b/base/proposal.pdf
index 49f02e6..dc8e3b0 100644
Binary files a/base/proposal.pdf and b/base/proposal.pdf differ
diff --git a/base/proposal.sty b/base/proposal.sty
index 805657b..9fecb2e 100644
--- a/base/proposal.sty
+++ b/base/proposal.sty
@@ -54,13 +54,14 @@
 \renewcommand{\headrulewidth}{0pt}
 \renewcommand{\footrulewidth}{0.4pt}
 \else
-\fancyhead[RE,LO]{\prop@gen@acronym}
+\fancyhead[RE,LO]{\ifx\prop@gen@acronym\@empty\prop@gen@acronym\fi}
 \fancyhfoffset{0pt}
 \fi
 \fancyfoot[C]{}
 \newcommand\prop@of@pages[2]{page~#1\ifofpage~of~#2\fi}
 \ifgrantagreement
-\fancyfoot[L]{\prop@gen@proposalnumber\quad \prop@gen@acronym\quad --\quad Part B}
+\fancyfoot[L]{\prop@gen@proposalnumber%
+\ifx\prop@gen@acronym\quad \prop@gen@acronym\fi\quad --\quad Part B}
 \fancyfoot[R]{\thepage}
 \else
 \fancyhead[LE,RO]{\prop@of@pages\thepage{\pdataref@num{prop}{page}{last}}}