diff --git a/gcc.spec b/gcc.spec
index 927dddd..528d140 100644
--- a/gcc.spec
+++ b/gcc.spec
@@ -910,8 +910,8 @@ so that there cannot be any synchronization problems.
 %endif
 %patch -P11 -p0 -b .d-shared-libphobos~
 
-%patch -P15 -p0 -b .non-vec-ice
-%patch -P16 -p0 -b .vec-sign-compare
+%patch -P15 -p1 -b .non-vec-ice
+%patch -P16 -p1 -b .vec-sign-compare
 
 %patch -P50 -p0 -b .rh2155127~
 touch -r isl-0.24/m4/ax_prog_cxx_for_build.m4 isl-0.24/m4/ax_prog_cc_for_build.m4