diff --git a/dsf-gdb/org.eclipse.cdt.tests.dsf.gdb/data/launch/src/Makefile b/dsf-gdb/org.eclipse.cdt.tests.dsf.gdb/data/launch/src/Makefile
index 777b8b828b3..85dc0c07d4c 100644
--- a/dsf-gdb/org.eclipse.cdt.tests.dsf.gdb/data/launch/src/Makefile
+++ b/dsf-gdb/org.eclipse.cdt.tests.dsf.gdb/data/launch/src/Makefile
@@ -1,6 +1,6 @@
 src = $(wildcard *.cc *.c)
 destDir = ../bin
-GCCFLAGS = -g -pthread
+GCCFLAGS = -g -pthread -m32
 
 all:
 	@mkdir -p $(destDir)