diff --git a/libjpeg-turbo.spec b/libjpeg-turbo.spec
index 16d4df9..3c83dfc 100644
--- a/libjpeg-turbo.spec
+++ b/libjpeg-turbo.spec
@@ -63,7 +63,7 @@ Provides:	libjpeg-static = 6b-47
 %if "%{?_isa}" != ""
 Provides:	libjpeg-static%{_isa} = 6b-47
 %endif
-Requires:	libjpeg-turbo-devel%{_isa} = %{version}-%{release}
+Requires:	libjpeg-turbo-devel%{?_isa} = %{version}-%{release}
 
 %description static
 The libjpeg-turbo-static package contains static library for manipulating