diff --git a/GorgonMeducer.perf_counter.pdsc b/GorgonMeducer.perf_counter.pdsc
index ddf9088..916944b 100644
--- a/GorgonMeducer.perf_counter.pdsc
+++ b/GorgonMeducer.perf_counter.pdsc
@@ -281,7 +281,7 @@
                 <file category="header"         name="perf_counter.h"/>
                 <file category="sourceC"        name="perf_counter.c" />
                 <file category="sourceAsm"      name="systick_wrapper_ual.s"        condition="Previous Generation Cortex-M Arm Compiler CMSIS-CORE"/>
-                <file category="sourceAsm"      name="systick_wrapper_gcc.S"        condition="Cortex-M Arm GCC CMSIS-CORE"/>
+                <file category="sourceAsm"      name="systick_wrapper_gcc.s"        condition="Cortex-M Arm GCC CMSIS-CORE"/>
                 <file category="sourceAsm"      name="systick_wrapper_gnu.s"        condition="Armv8-M Arm Compiler CMSIS-CORE"/>
               </files>
               <RTE_Components_h>