diff --git a/julia.spec b/julia.spec
index 209eea7..fb1ffb8 100644
--- a/julia.spec
+++ b/julia.spec
@@ -9,7 +9,7 @@
 
 Name:           julia
 Version:        0.4.2
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        High-level, high-performance dynamic language for technical computing
 Group:          Development/Languages
 # Julia itself is MIT, with a few LGPLv2+ and GPLv2+ files
@@ -36,7 +36,7 @@ BuildRequires:  libgit2-devel >= 0.21
 BuildRequires:  libunwind-devel
 BuildRequires:  llvm%{llvmversion}-devel
 BuildRequires:  mpfr-devel >= 3.0
-%ifarch 0%{?__isa_bits} == 64
+%if 0%{?__isa_bits} == 64
 BuildRequires:  openblas-threads64_
 %else
 BuildRequires:  openblas-threads
@@ -61,7 +61,7 @@ Requires:       gmp >= 5.0
 Requires:       julia-common = %{version}-%{release}
 Requires:       libgit2 >= 0.21
 Requires:       mpfr >= 3.0
-%ifarch 0%{?__isa_bits} == 64
+%if 0%{?__isa_bits} == 64
 Requires:       openblas-threads64_
 %else
 Requires:       openblas-threads
@@ -152,7 +152,7 @@ popd
 %global march armv8-a
 %endif
 
-%ifarch 0%{?__isa_bits} == 64
+%if 0%{?__isa_bits} == 64
 %global blas USE_BLAS64=1 LIBBLAS=-lopenblasp64_ LIBBLASNAME=libopenblasp64_.so.0 LIBLAPACK=-lopenblasp64_ LIBLAPACKNAME=libopenblasp64_.so.0
 %else
 %global blas USE_BLAS64=0 LIBBLAS=-lopenblasp LIBBLASNAME=libopenblasp.so.0 LIBLAPACK=-lopenblasp LIBLAPACKNAME=libopenblasp.so.0
@@ -293,6 +293,9 @@ exit 0
 /usr/bin/gtk-update-icon-cache %{_datarootdir}/icons/hicolor &>/dev/null || :
 
 %changelog
+* Tue Jan 5 2016 Orion Poplawski <orion@cora.nwra.com> - 0.4.2-3
+- Use proper conditional for __isa_bits tests
+
 * Thu Dec 24 2015 Milan Bouchet-Valat <nalimilan@club.fr> - 0.4.2-2
 - Use new ILP64 OpenBLAS, suffixed with 64_ (ARPACK and SuiteSparse still use
   the LP64 Atlas).