diff --git a/math/openblas/Makefile b/math/openblas/Makefile
index f29882457ee7..963e6823dba5 100644
--- a/math/openblas/Makefile
+++ b/math/openblas/Makefile
@@ -85,6 +85,9 @@ MANUAL_PACKAGE_BUILD=	Optimizes for the build machine.
 
 .if ${PORT_OPTIONS:MDYNAMIC_ARCH}
 BUILDFLAGS+=	DYNAMIC_ARCH=1
+PLIST_SUB+=	DYNARCH=""
+.else
+PLIST_SUB+=	DYNARCH="@comment "
 .endif
 
 .if ${PORT_OPTIONS:MINTERFACE64}
@@ -201,7 +204,10 @@ do-install:
 		${WRKSRC}/interface/*.c
 	${MKDIR} ${STAGEDIR}${PREFIX}/include/openblas
 	${INSTALL_DATA} ${WRKSRC}/openblas_*.h ${STAGEDIR}${PREFIX}/include/openblas
-	${INSTALL_DATA} ${WRKSRC}/cblas.h ${WRKSRC}/config_kernel.h ${WRKSRC}/config_last.h ${WRKSRC}/l1param.h ${WRKSRC}/l2param.h ${WRKSRC}/symcopy.h \
+	${INSTALL_DATA} ${WRKSRC}/cblas.h ${WRKSRC}/config_last.h ${WRKSRC}/l1param.h ${WRKSRC}/l2param.h ${WRKSRC}/symcopy.h \
 		${STAGEDIR}${PREFIX}/include/openblas
 
+do-install-DYNAMIC_ARCH-on:
+	${INSTALL_DATA} ${WRKSRC}/config_kernel.h ${STAGEDIR}${PREFIX}/include/openblas
+
 .include <bsd.port.mk>
diff --git a/math/openblas/pkg-plist b/math/openblas/pkg-plist
index 88ee3f7b158c..908883c637d2 100644
--- a/math/openblas/pkg-plist
+++ b/math/openblas/pkg-plist
@@ -29,7 +29,7 @@ include/openblas/openblas_common_x86_64.h
 include/openblas/openblas_common_z.h
 include/openblas/openblas_common_zarch.h
 include/openblas/openblas_config.h
-include/openblas/config_kernel.h
+%%DYNARCH%%include/openblas/config_kernel.h
 include/openblas/config_last.h
 include/openblas/openblas_cpuid.h
 include/openblas/l1param.h