diff --git a/hdf5-1.6.6-alias.patch b/hdf5-1.6.6-alias.patch
new file mode 100644
index 0000000..cbb0e3a
--- /dev/null
+++ b/hdf5-1.6.6-alias.patch
@@ -0,0 +1,42 @@
+--- hdf5-1.6.6/test/dtypes.c.alias	2007-08-16 10:12:05.000000000 -0600
++++ hdf5-1.6.6/test/dtypes.c	2008-02-06 10:14:42.000000000 -0700
+@@ -5645,24 +5645,33 @@
+ 	    for (j=0; j<nelmts; j++) {
+ 		/* Do it this way for alignment reasons */
+ #if H5_SIZEOF_LONG_DOUBLE!=H5_SIZEOF_DOUBLE
+-		long double temp[1];
++		union {
++		    long double ld[1];
++		    double d[1];
++		    float f[1];
++		    unsigned char uc[1];
++		} temp;
+ #else
+-		double temp[1];
++		union {
++		    double d[1];
++		    float f[1];
++		    unsigned char uc[1];
++		} temp;
+ #endif
+ 		if (src_size<=dst_size) {
+ 		    for (k=0; k<dst_size; k++) buf[j*src_size+k] = HDrand();
+ 		} else {
+ 		    for (k=0; k<dst_size; k++)
+-			((unsigned char*)temp)[k] = HDrand();
++			temp.uc[k] = HDrand();
+ 		    if (FLT_DOUBLE==src_type && FLT_FLOAT==dst_type) {
+-			hw_d = *((float*)temp);
++			hw_d = *(temp.f);
+ 			HDmemcpy(buf+j*src_size, &hw_d, src_size);
+ #if H5_SIZEOF_LONG_DOUBLE!=H5_SIZEOF_DOUBLE
+ 		    } else if (FLT_LDOUBLE==src_type && FLT_FLOAT==dst_type) {
+-			hw_ld = *((float*)temp);
++			hw_ld = *(temp.f);
+ 			HDmemcpy(buf+j*src_size, &hw_ld, src_size);
+ 		    } else if (FLT_LDOUBLE==src_type && FLT_DOUBLE==dst_type) {
+-			hw_ld = *((double*)temp);
++			hw_ld = *(temp.d);
+ 			HDmemcpy(buf+j*src_size, &hw_ld, src_size);
+ #endif
+ 		    }
diff --git a/hdf5.spec b/hdf5.spec
index 83ba0db..8b76d35 100644
--- a/hdf5.spec
+++ b/hdf5.spec
@@ -1,6 +1,6 @@
 Name: hdf5
 Version: 1.6.6
-Release: 6%{?dist}
+Release: 7%{?dist}
 Summary: A general purpose library and file format for storing scientific data
 License: BSD
 Group: System Environment/Libraries
@@ -18,6 +18,7 @@ Patch10: hdf5-1.6.5-open.patch
 Patch11: hdf5-1.6.6-alpha.patch
 Patch12: hdf5-1.6.6-s390.patch
 Patch13: hdf5-1.6.6-free.patch
+Patch14: hdf5-1.6.6-alias.patch
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: krb5-devel, openssl-devel, zlib-devel, gcc-gfortran, time
 
@@ -52,14 +53,17 @@ HDF5 development headers and libraries.
 %patch11 -p1 -b .alpha
 %patch12 -p1 -b .s390
 %patch13 -p1 -b .free
+%patch14 -p1 -b .alias
 
 
 %build
 export CC=gcc
 export CXX=g++
 export F9X=gfortran
-%configure --with-ssl --enable-cxx --enable-fortran \
-           --enable-threadsafe --with-pthread
+# Must turn of production mode to preserve -g during compile
+%configure --enable-production=no --enable-debug=no \
+           --enable-cxx --enable-fortran --enable-threadsafe \
+           --with-pthread --with-ssl
 make
 
 
@@ -115,6 +119,10 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Wed Feb  6 2008 Orion Poplawski <orion@cora.nwra.com> 1.6.6-7
+- Add patch to fix strict-aliasing
+- Disable production mode to enable debuginfo
+
 * Tue Feb  5 2008 Orion Poplawski <orion@cora.nwra.com> 1.6.6-6
 - Add patch to fix calling free() in H5PropList.cpp